JL Audio 98226 - 5-Channel Class-D Marine System Amplifier

owner’s manual - Transcript

• Page 1 - English - : owners manual 5Channel ClassD Marine System Amplifier Thank you for purchasing a JL Audio amplifier for your marine sound system Your amplifier has been designed and manufactured to exacting standards in order to ensure years of musical enjoyment in your vessel For maximum performance we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer Your authorized dealer has the training expertise and installation equipment to ensure optimum performance from this product Should you decide to install the amplifier yourself please take the time to read this manual thoroughly so as to familiarize yourself with its installation requirements and setup procedures If you have any questions regarding the instructions in this manual or any aspect of your amplifiers operation please contact your authorized JL Audio dealer for assistance If you need further assistance please call the JL Audio Technical Support Department at 954 4431100 during business hours
• Page 2 - English - : 2 JL Audio MHD9005 Owners Manual Cooling efficiency Considerations The outer shell of your JL Audio amplifier is designed to remove heat from the amplifier circuitry For optimum cooling performance this outer shell should be exposed to as large a volume of air as possible Enclosing the amplifier in a small poorly ventilated chamber can lead to excessive heat buildup and degraded performance If an installation calls for an enclosure around the amplifier we recommend that this enclosure be ventilated with the aid of a fan In normal applications fancooling is not necessary Mounting the amplifier upside down is strongly discouraged If mounting the amplifier under a seat make sure there is at least 1 inch 25 cm of space above the amplifiers outer shell to permit proper cooling ProteCt Your Hearing We value you as a longterm customer For that reason we urge you to practice restraint in the operation of this product so as not to damage your hearing and that of others in your vessel Studies have shown that continuous exposure to high sound pressure levels can lead to permanent irreparable hearing loss This and all other highpower amplifiers are capable of producing such high sound pressure levels when connected to a speaker system Please limit your continuous exposure to high volume levels While driving operate your audio system in a manner that still allows you to hear necessary noises to operate your vessel safely horns sirens etc serial number In the event that your amplifier requires service or is ever stolen you will need to have a record of the products serial number Please take the time to enter that number in the space provided below The serial number can be found on the bottom panel of the amplifier and on the amplifier packaging Serial Number installation aPPliCations This amplifier is designed for operation in vessels with 12 volt negativeground electrical systems Use of this product in vessels with positive ground andor voltages other than 12V may result in damage to the product and will void the warranty This product is not certified or approved for use in aircraft Do not attempt to bridge the outputs of this amplifier with the outputs of a second amplifier including an identical one Planning Your installation It is important that you take the time to read this manual and that you plan out your installation carefully The following are some considerations that you must take into account when planning your installation Filter Frequency Selector pg 11 Filter Frequency Selector pg 10 Input Voltage Selection pg 9 Infrasonic Filter Selector pg 11 Input Sensitivity Control pg 10 Input Mode Selection pg 9 Filter Slope Selection pg 11 Filter Frequency Selector pg 11 Input Sensitivity Control pg 10 Filter Slope Selection pg 11 Input Sensitivity Control pg 10 Power Status Indicator pg 15 Filter Slope Selection pg 11 Left amp Right Input Jacks Subwoofer pg 9 Left amp Right Input Jacks Front Channels pg 9 Speaker Outputs pgs 1314 Jack for Remote Level Control Knob pg 13 Left amp Right Input Jacks Rear Channels pg 9 Chassis Ground Connector pgs 67 Remote TurnOn Connector pgs 67 12 V Power Connector pgs 67 safety Considerations Your amplifier needs to be installed in a dry wellventilated environment and in a manner which does not interfere with your vessels factory installed electronic devices You should also take the time to securely mount the amplifier so that it does not come loose in the event of a collision sudden jolt or as a result of the repeated vibrations the vessel is prone to during normal operation stupid mistakes to avoid Check before drilling any holes in your vessel to make sure that you will not be drilling through the hull a fuel tank fuel line wiring harness or other vital vessel system Do not run system wiring outside or underneath the vessel This is an extremely dangerous practice which can result in severe damage to your vessel and person Protect all system wires from sharp edges metal fiberglass etc by carefully routing them tying them down and using grommets and loom where appropriate Do not mount the amplifier in the engine compartment or in any other area that will expose the amplifier circuitry to the elements While this amplifier is specially designed for marine applications it is not waterproof and it should not be mounted where it is likely to get wet
• Page 3 - English - : 2 JL Audio MHD9005 Owners Manual Cooling efficiency Considerations The outer shell of your JL Audio amplifier is designed to remove heat from the amplifier circuitry For optimum cooling performance this outer shell should be exposed to as large a volume of air as possible Enclosing the amplifier in a small poorly ventilated chamber can lead to excessive heat buildup and degraded performance If an installation calls for an enclosure around the amplifier we recommend that this enclosure be ventilated with the aid of a fan In normal applications fancooling is not necessary Mounting the amplifier upside down is strongly discouraged If mounting the amplifier under a seat make sure there is at least 1 inch 25 cm of space above the amplifiers outer shell to permit proper cooling ProteCt Your Hearing We value you as a longterm customer For that reason we urge you to practice restraint in the operation of this product so as not to damage your hearing and that of others in your vessel Studies have shown that continuous exposure to high sound pressure levels can lead to permanent irreparable hearing loss This and all other highpower amplifiers are capable of producing such high sound pressure levels when connected to a speaker system Please limit your continuous exposure to high volume levels While driving operate your audio system in a manner that still allows you to hear necessary noises to operate your vessel safely horns sirens etc serial number In the event that your amplifier requires service or is ever stolen you will need to have a record of the products serial number Please take the time to enter that number in the space provided below The serial number can be found on the bottom panel of the amplifier and on the amplifier packaging Serial Number installation aPPliCations This amplifier is designed for operation in vessels with 12 volt negativeground electrical systems Use of this product in vessels with positive ground andor voltages other than 12V may result in damage to the product and will void the warranty This product is not certified or approved for use in aircraft Do not attempt to bridge the outputs of this amplifier with the outputs of a second amplifier including an identical one Planning Your installation It is important that you take the time to read this manual and that you plan out your installation carefully The following are some considerations that you must take into account when planning your installation Filter Frequency Selector pg 11 Filter Frequency Selector pg 10 Input Voltage Selection pg 9 Infrasonic Filter Selector pg 11 Input Sensitivity Control pg 10 Input Mode Selection pg 9 Filter Slope Selection pg 11 Filter Frequency Selector pg 11 Input Sensitivity Control pg 10 Filter Slope Selection pg 11 Input Sensitivity Control pg 10 Power Status Indicator pg 15 Filter Slope Selection pg 11 Left amp Right Input Jacks Subwoofer pg 9 Left amp Right Input Jacks Front Channels pg 9 Speaker Outputs pgs 1314 Jack for Remote Level Control Knob pg 13 Left amp Right Input Jacks Rear Channels pg 9 Chassis Ground Connector pgs 67 Remote TurnOn Connector pgs 67 12 V Power Connector pgs 67 safety Considerations Your amplifier needs to be installed in a dry wellventilated environment and in a manner which does not interfere with your vessels factory installed electronic devices You should also take the time to securely mount the amplifier so that it does not come loose in the event of a collision sudden jolt or as a result of the repeated vibrations the vessel is prone to during normal operation stupid mistakes to avoid Check before drilling any holes in your vessel to make sure that you will not be drilling through the hull a fuel tank fuel line wiring harness or other vital vessel system Do not run system wiring outside or underneath the vessel This is an extremely dangerous practice which can result in severe damage to your vessel and person Protect all system wires from sharp edges metal fiberglass etc by carefully routing them tying them down and using grommets and loom where appropriate Do not mount the amplifier in the engine compartment or in any other area that will expose the amplifier circuitry to the elements While this amplifier is specially designed for marine applications it is not waterproof and it should not be mounted where it is likely to get wet
• Page 4 - English - : 4 JL Audio MHD9005 Owners Manual tYPiCal installation sequenCe The following represents the sequence for a typical amplifier installation using an aftermarket source unit or OEM Interface processor like the CleanSweep CL441dsp Additional steps and different procedures may be required in some applications If you have any questions please contact your authorized JL Audio dealer for assistance 1 Disconnect the negative battery post connection and secure the disconnected cable to prevent accidental reconnection during installation This step is not optional 2 Run positive and negative power wire from the battery location to the amplifier mounting location taking care to route it in such a way that it will not be damaged and will not interfere with vessel operation 4 AWG is the minimum recommended wire size for this amplifier Use a 2 AWG or 10 AWG main power wire with a power distribution block when additional amplifiers are being installed with the MHD9005 and powered from the same main power wire 3 Connect power wire to the positive battery post Fuse the wire with an appropriate fuse block and connectors within 18 inches 45 cm wire length of the positive battery post This fuse is essential to protect the vessel Do not install the fuse until the power wire has been connected to the amplifier 4 Connect negative power wire to the negative battery post Use the same size power wire as the wire connected to the 12V connection 5 Run signal cables RCA cables and remote turnon wire from the source unit or interface processor to the amplifier mounting location 6 Run speaker wire from the speaker systems to the amplifier mounting location 7 Securely mount the amplifier using appropriate hardware See page 8 for detailed mounting instructions 8 Connect the remote turnon wire and the positive and negative power wires to the amplifiers power connector plug Then insert the power connector plug into the amplifiers power connector receptacle pushing firmly 9 Connect the RCA input cables to the amplifier 10 Connect the speaker wires to the speaker connector plugs and insert the plugs firmly into the speaker connector receptacles 11 Carefully review the amplifiers control settings to make sure that they are set according to the needs of the system 12 Install power wire fuse 60A for a single MHD9005 and reconnect the negative battery post terminal 13 Turn on the source unit at a low level to doublecheck that the amplifier is configured correctly Resist the temptation to crank it up until you have verified the control settings 14 Make necessary adjustments to the input sensitivity controls to obtain the right overall output and the desired balance in the system See Appendix C pages 18 19 for the recommended input sensitivity setting method 15 Enjoy the fruits of your labor with your favorite music ProduCt desCriPtion The JL Audio MHD9005 is a very powerful and compact fivechannel amplifier utilizing patented Single Cycle Control Class D technology for all channels This groundbreaking technology delivers referencegrade full range sonic performance while requiring far less current from the vessels electrical system than a conventional amplifier JL Audios exclusive RIPS power supply design optimizes the output of each channel section for any impedance between 15 and 4 ohms per channel 38 ohms bridged on front and rear sections allowing you to get full use of the MHD9005s performance capabilities with a wide range of speaker systems The tightly regulated power supply design also means that the MHD9005s clean power output capability remains stable over a wide range of vessel voltages resulting in enhanced fidelity The MHD9005 flexible studiograde signal processing allows it to be deployed in several different system configurations 1 As a fivechannel amplifier in a biamplified system driving four satellite speakers 100W x 4 plus a subwoofer system 500W x 1 2 As a very powerful threechannel amplifier in a biamplified system driving two satellite speakers 150W x 2 bridged plus a subwoofer system 500W x 1 3 As a fivechannel amplifier in a triamplified system driving two tweeters 100W x 2 plus two woofermids 100W x 2 plus a subwoofer system 500W x 1 An external 2way crossover is required for this application The MHD9005s flexible input and crossover sections permit operation with a wide variety of source units and system configurations It can be operated with a single pair of stereo inputs with two pairs of stereo inputs front and rear or with separate inputs for its front rear and subwoofer channels As we said its very flexible
• Page 5 - English - : 4 JL Audio MHD9005 Owners Manual tYPiCal installation sequenCe The following represents the sequence for a typical amplifier installation using an aftermarket source unit or OEM Interface processor like the CleanSweep CL441dsp Additional steps and different procedures may be required in some applications If you have any questions please contact your authorized JL Audio dealer for assistance 1 Disconnect the negative battery post connection and secure the disconnected cable to prevent accidental reconnection during installation This step is not optional 2 Run positive and negative power wire from the battery location to the amplifier mounting location taking care to route it in such a way that it will not be damaged and will not interfere with vessel operation 4 AWG is the minimum recommended wire size for this amplifier Use a 2 AWG or 10 AWG main power wire with a power distribution block when additional amplifiers are being installed with the MHD9005 and powered from the same main power wire 3 Connect power wire to the positive battery post Fuse the wire with an appropriate fuse block and connectors within 18 inches 45 cm wire length of the positive battery post This fuse is essential to protect the vessel Do not install the fuse until the power wire has been connected to the amplifier 4 Connect negative power wire to the negative battery post Use the same size power wire as the wire connected to the 12V connection 5 Run signal cables RCA cables and remote turnon wire from the source unit or interface processor to the amplifier mounting location 6 Run speaker wire from the speaker systems to the amplifier mounting location 7 Securely mount the amplifier using appropriate hardware See page 8 for detailed mounting instructions 8 Connect the remote turnon wire and the positive and negative power wires to the amplifiers power connector plug Then insert the power connector plug into the amplifiers power connector receptacle pushing firmly 9 Connect the RCA input cables to the amplifier 10 Connect the speaker wires to the speaker connector plugs and insert the plugs firmly into the speaker connector receptacles 11 Carefully review the amplifiers control settings to make sure that they are set according to the needs of the system 12 Install power wire fuse 60A for a single MHD9005 and reconnect the negative battery post terminal 13 Turn on the source unit at a low level to doublecheck that the amplifier is configured correctly Resist the temptation to crank it up until you have verified the control settings 14 Make necessary adjustments to the input sensitivity controls to obtain the right overall output and the desired balance in the system See Appendix C pages 18 19 for the recommended input sensitivity setting method 15 Enjoy the fruits of your labor with your favorite music ProduCt desCriPtion The JL Audio MHD9005 is a very powerful and compact fivechannel amplifier utilizing patented Single Cycle Control Class D technology for all channels This groundbreaking technology delivers referencegrade full range sonic performance while requiring far less current from the vessels electrical system than a conventional amplifier JL Audios exclusive RIPS power supply design optimizes the output of each channel section for any impedance between 15 and 4 ohms per channel 38 ohms bridged on front and rear sections allowing you to get full use of the MHD9005s performance capabilities with a wide range of speaker systems The tightly regulated power supply design also means that the MHD9005s clean power output capability remains stable over a wide range of vessel voltages resulting in enhanced fidelity The MHD9005 flexible studiograde signal processing allows it to be deployed in several different system configurations 1 As a fivechannel amplifier in a biamplified system driving four satellite speakers 100W x 4 plus a subwoofer system 500W x 1 2 As a very powerful threechannel amplifier in a biamplified system driving two satellite speakers 150W x 2 bridged plus a subwoofer system 500W x 1 3 As a fivechannel amplifier in a triamplified system driving two tweeters 100W x 2 plus two woofermids 100W x 2 plus a subwoofer system 500W x 1 An external 2way crossover is required for this application The MHD9005s flexible input and crossover sections permit operation with a wide variety of source units and system configurations It can be operated with a single pair of stereo inputs with two pairs of stereo inputs front and rear or with separate inputs for its front rear and subwoofer channels As we said its very flexible
• Page 6 - English - : 6 JL Audio MHD9005 Owners Manual Many vessels employ small 10 AWG 6 AWG wire to ground the battery to the vessel chassis and to connect the alternators positive connection to the battery To prevent voltage drops these wires should be upgraded to 4 AWG pure copper wire when installing amplifier systems with main fuse ratings above 60A turnon wire The MHD9005 uses a conventional 12V remote turnon wire typically controlled by the source units remote turnon output The amplifier will turn on when 12V is present at its Remote input and turn off when 12V is switched off If a source unit does not have a dedicated remote turnon output the amplifiers turnon lead can be connected to 12V via a switch that derives power from an ignition switched circuit The MHD9005s Remote turnon connector is designed to accept 18 AWG 12 AWG wire 18 AWG is more than adequate for this purpose To connect the remote turnon wire to the amplifier first back out the set screw on the bottom of the Power Connector Plug using the supplied hex wrench Strip 12 inch 12mm of wire and insert the bare wire into the receptacle seating it firmly so that no bare wire is exposed When using smaller wire it may be necessary to strip 1 inch of insulation from the wire and fold the bare wire in half prior to insertion While holding the wire in the terminal tighten the set screw firmly using the supplied 25 mm hex wrench taking care not to strip the head of the screw and making sure that the wire is firmly gripped by the set screw amplifier Power Connector Plug To connect the power wires and the remote turnon wire to the amplifier unplug the power connector plug from the amplifier chassis pull back firmly and back out the set screws on the connector plug using the supplied 4 mm hex wrench for the 12 VDC and Ground connections and the supplied 25 mm hex wrench for the Remote connection Strip 38 inch 10 mm of insulation from the end of each wire and insert the bare wire into the receptacle on power connector plug seating it firmly so that no bare wire is exposed While holding each wire in place tighten each set screw firmly taking care not to strip the head of the screw Never make power connections with a live wire Always disconnect the negative battery post before making any connections or adjustments to a 12V power connection Power and turnon ConneCtions Before installing the amplifier disconnect the negative ground wire from the vessels battery This will prevent accidental damage to the system the vessel and your body during installation 12V battery Connection You will need to connect a power wire to the vessels positive battery terminal using an appropriate power ring or specialized battery terminal connector such as the JL Audio XBBTU This connection must be tight and corrosionfree to ensure proper connectivity This wire MUST be fused appropriately for safety Any positive power wires run through metal barriers must be protected with a high quality insulating grommet to prevent damage to the insulation of the wire Failure to do so may result in a dangerous short circuit Power wire requirements The MHD9005s 12 VDC and Ground connections are designed to accept 4 AWG power wire 4 AWG pure copper wire is the minimum recommended wire size for this amplifier Use of smaller gauge wire including cheap wire that is fraudulently sold as 4 AWG wire can create a fire hazard If you are installing the MHD9005 with other amplifiers and wish to use a single main power wire use 2 AWG or 10 AWG pure copper wire as a main power wire This 2 AWG or 10 AWG power wire should terminate into a distribution block mounted as close to the amplifiers as possible and should connect to the MHD9005 with 4 AWG pure copper power wire with each smaller wire fused appropriately for each amplifier or other electronics in the system Please note that lower AWG numbers mean bigger wire and viceversa 10 AWG is the largest 2 AWG is smaller then 4 AWG then 8 AWG etc We do not recommend the use of copperclad aluminum wire or CCA wire because this wire is significantly less conductive than pure copper wire Only use pure copper power wire such as JL Audios MetaWire Tinned copper wire silver color is acceptable as the tinplating is only a very minor component of the wire Fuse requirements The installation of a fuse on the main power wire within 18 wire inches 45 cm of the positive battery terminal is vital to protect the wire and the vessel from fire in the event of a collision or shortcircuit The fuse value at each power wire should be just high enough for all of the equipment being run from that power wire Do not use a fuse with a value that far exceeds the total fuse rating of the electronics connected to the wire If only the MHD9005 is being run from a single power wire install a 60A fuse to protect the wire AGU big glass fuse AFS small blade fuse or MaxiFuse big plastic body fuse types are recommended If other amplifiers are also being powered from a main power wire and exceed 80 amps in total fuse rating we recommend the use of an ANL largeblade fuse and holder Each amplifier can then be fused independently at the outputs of the power distribution block Use JL Audio part XCFOA2PAK and appropriate MaxiFuse type fuses with JL Audio distribution blocks Please consult with your JL Audio dealer to make sure that the wire fuse holder and fuse ratings are appropriate for your systems needs The safety of your installation depends on appropriate power connections and fuse protection ground Connection The ground connection should be made using the same gauge wire as the power connection It is common for the alternator to be grounded through its chassis If the alternator is not grounded through its chassis and instead employs a small 10 AWG 6 AWG wire to connect to ground this wire should also be upgraded to 4 AWG when installing amplifier systems with main fuse ratings above 60A
• Page 7 - English - : 6 JL Audio MHD9005 Owners Manual Many vessels employ small 10 AWG 6 AWG wire to ground the battery to the vessel chassis and to connect the alternators positive connection to the battery To prevent voltage drops these wires should be upgraded to 4 AWG pure copper wire when installing amplifier systems with main fuse ratings above 60A turnon wire The MHD9005 uses a conventional 12V remote turnon wire typically controlled by the source units remote turnon output The amplifier will turn on when 12V is present at its Remote input and turn off when 12V is switched off If a source unit does not have a dedicated remote turnon output the amplifiers turnon lead can be connected to 12V via a switch that derives power from an ignition switched circuit The MHD9005s Remote turnon connector is designed to accept 18 AWG 12 AWG wire 18 AWG is more than adequate for this purpose To connect the remote turnon wire to the amplifier first back out the set screw on the bottom of the Power Connector Plug using the supplied hex wrench Strip 12 inch 12mm of wire and insert the bare wire into the receptacle seating it firmly so that no bare wire is exposed When using smaller wire it may be necessary to strip 1 inch of insulation from the wire and fold the bare wire in half prior to insertion While holding the wire in the terminal tighten the set screw firmly using the supplied 25 mm hex wrench taking care not to strip the head of the screw and making sure that the wire is firmly gripped by the set screw amplifier Power Connector Plug To connect the power wires and the remote turnon wire to the amplifier unplug the power connector plug from the amplifier chassis pull back firmly and back out the set screws on the connector plug using the supplied 4 mm hex wrench for the 12 VDC and Ground connections and the supplied 25 mm hex wrench for the Remote connection Strip 38 inch 10 mm of insulation from the end of each wire and insert the bare wire into the receptacle on power connector plug seating it firmly so that no bare wire is exposed While holding each wire in place tighten each set screw firmly taking care not to strip the head of the screw Never make power connections with a live wire Always disconnect the negative battery post before making any connections or adjustments to a 12V power connection Power and turnon ConneCtions Before installing the amplifier disconnect the negative ground wire from the vessels battery This will prevent accidental damage to the system the vessel and your body during installation 12V battery Connection You will need to connect a power wire to the vessels positive battery terminal using an appropriate power ring or specialized battery terminal connector such as the JL Audio XBBTU This connection must be tight and corrosionfree to ensure proper connectivity This wire MUST be fused appropriately for safety Any positive power wires run through metal barriers must be protected with a high quality insulating grommet to prevent damage to the insulation of the wire Failure to do so may result in a dangerous short circuit Power wire requirements The MHD9005s 12 VDC and Ground connections are designed to accept 4 AWG power wire 4 AWG pure copper wire is the minimum recommended wire size for this amplifier Use of smaller gauge wire including cheap wire that is fraudulently sold as 4 AWG wire can create a fire hazard If you are installing the MHD9005 with other amplifiers and wish to use a single main power wire use 2 AWG or 10 AWG pure copper wire as a main power wire This 2 AWG or 10 AWG power wire should terminate into a distribution block mounted as close to the amplifiers as possible and should connect to the MHD9005 with 4 AWG pure copper power wire with each smaller wire fused appropriately for each amplifier or other electronics in the system Please note that lower AWG numbers mean bigger wire and viceversa 10 AWG is the largest 2 AWG is smaller then 4 AWG then 8 AWG etc We do not recommend the use of copperclad aluminum wire or CCA wire because this wire is significantly less conductive than pure copper wire Only use pure copper power wire such as JL Audios MetaWire Tinned copper wire silver color is acceptable as the tinplating is only a very minor component of the wire Fuse requirements The installation of a fuse on the main power wire within 18 wire inches 45 cm of the positive battery terminal is vital to protect the wire and the vessel from fire in the event of a collision or shortcircuit The fuse value at each power wire should be just high enough for all of the equipment being run from that power wire Do not use a fuse with a value that far exceeds the total fuse rating of the electronics connected to the wire If only the MHD9005 is being run from a single power wire install a 60A fuse to protect the wire AGU big glass fuse AFS small blade fuse or MaxiFuse big plastic body fuse types are recommended If other amplifiers are also being powered from a main power wire and exceed 80 amps in total fuse rating we recommend the use of an ANL largeblade fuse and holder Each amplifier can then be fused independently at the outputs of the power distribution block Use JL Audio part XCFOA2PAK and appropriate MaxiFuse type fuses with JL Audio distribution blocks Please consult with your JL Audio dealer to make sure that the wire fuse holder and fuse ratings are appropriate for your systems needs The safety of your installation depends on appropriate power connections and fuse protection ground Connection The ground connection should be made using the same gauge wire as the power connection It is common for the alternator to be grounded through its chassis If the alternator is not grounded through its chassis and instead employs a small 10 AWG 6 AWG wire to connect to ground this wire should also be upgraded to 4 AWG when installing amplifier systems with main fuse ratings above 60A
• Page 8 - English - : 8 JL Audio MHD9005 Owners Manual amPliFier inPuts The MHD9005 has three separate input sections one for the Front left and right channels another for the Rear left and right channels and one for the Subwoofer Channel Each section consists of a pair of RCAtype input jacks on the Connection Panel of the amplifier and input controls on the Control Panel of the amplifier a single Input Voltage switch an Input Mode switch and three individual Input Sens rotary controls one in each channel section inPut mode switCH The Input Mode switch is located under the General Setup heading at the far right of the control panel This switch allows operation of all five amplifier channels with only one pair of input signals 2 ch or with independent front and rear input signal pairs 4 ch or with discrete front rear and subwoofer signal pairs 6 ch 6 Ch input mode In this mode you will connect separate pairs of input cables to the Front Rear and Sub amplifier inputs allowing you full channel control from the source unit If the source unit only provides a mono single subwoofer output use a yadaptor cable to feed both the Left and Right subwoofer inputs of the MHD9005 with the mono signal Failure to do so will result in reduced gain and possible distortion 4 Ch input mode In this mode you will connect separate pairs of input cables to the Front and Rear amplifier inputs and leave the Sub inputs unused The subwoofer channels will receive signal from the sum of the signals at the Front and Rear inputs so that fronttorear fading of the main channels does not significantly affect the subwoofer level 2 Ch input mode To operate all five channels of the MHD9005 with a single pair of stereo inputs select the 2 Ch position on the Input Mode switch and connect a single pair of input cables to the Front input jacks only The Rear and Sub input jacks will remain unused In this mode the amplifier will route the signals connected to the Front inputs to the Front Rear and Subwoofer channels Fronttorear fading will not be available input Voltage switch A wide range of signal input voltages can be accommodated by each of the MHD9005s differentialbalanced inputs 200mV 8V RMS This wide range is split up into two subranges accessible via the Input Voltage switch located next to the Input Mode switch under the General Setup heading The Low position of the Input Voltage switch selects an input sensitivity range between 200mV and 2V for all the amplifier channels This means that the Input Sens rotary controls will operate within that voltage window If you are using an aftermarket source unit with preamp level outputs this is most likely the position that you will use regardless of what voltage output capability is claimed by the source unit The High position of the Input Voltage switch selects an input sensitivity range between 800mV and 8V This is for use with speakerlevel outputs from source units and small amplifiers found in many OEM factoryinstalled systems To use speakerlevel sources splice the speaker output wires of the source unit or small amplifier onto a pair of RCA plugs for each input pair or use the JL Audio ECS Speaker Wire to RCA adaptor XBCLRAIC2SW It is not necessary or advisable to use Line Output Converters with your MHD9005 amPliFier mounting oPtions The MHD9005 has two mounting options to ease in installation standard mounting The standard method of mounting requires removal of the four corner caps with the 4 mm hex wrench included with your amplifier Using appropriate mounting screws not included secure the amplifier in all four corners and replace the corner caps to cover the screws lateral mounting Feet Lateral Mounting Feet are also included with your MHD9005 to provide an alternative mounting option Each mounting foot should be attached to the bottom of the amplifier by screwing the provided bolt into the bottom of the amplifier and up into the corner cap with the supplied 25 mm hex wrench Next using appropriate mounting screws not included secure the amplifier by its four Lateral Mounting Feet Check before drilling any holes in your vessel to make sure that you will not be drilling through a gas tank brake line wiring harness or other vital vessel system Control Panel seCuritY CoVer The MHD9005 features a Control Panel Security Cover When installed the cover ensures that your amplifier settings are not accidentally changed while creating a clean aesthetic for the amplifier and your installation The control panel security cover is preinstalled at the factory and must be temporarily removed for access to the controls described throughout this manual The security cover is secured by a single 25 mm hexhead screw at the far right of the panel Loosen the hexhead screw to release the security cover it is not necessary to completely remove the screw To reinstall the security cover once all adjustments have been made insert the tongue on the covers left edge into the groove where the left side heatsink meets the control panel hinge the panel closed and secure the screw using the supplied 25 mm hex wrench Do not overtighten the screw
• Page 9 - English - : 8 JL Audio MHD9005 Owners Manual amPliFier inPuts The MHD9005 has three separate input sections one for the Front left and right channels another for the Rear left and right channels and one for the Subwoofer Channel Each section consists of a pair of RCAtype input jacks on the Connection Panel of the amplifier and input controls on the Control Panel of the amplifier a single Input Voltage switch an Input Mode switch and three individual Input Sens rotary controls one in each channel section inPut mode switCH The Input Mode switch is located under the General Setup heading at the far right of the control panel This switch allows operation of all five amplifier channels with only one pair of input signals 2 ch or with independent front and rear input signal pairs 4 ch or with discrete front rear and subwoofer signal pairs 6 ch 6 Ch input mode In this mode you will connect separate pairs of input cables to the Front Rear and Sub amplifier inputs allowing you full channel control from the source unit If the source unit only provides a mono single subwoofer output use a yadaptor cable to feed both the Left and Right subwoofer inputs of the MHD9005 with the mono signal Failure to do so will result in reduced gain and possible distortion 4 Ch input mode In this mode you will connect separate pairs of input cables to the Front and Rear amplifier inputs and leave the Sub inputs unused The subwoofer channels will receive signal from the sum of the signals at the Front and Rear inputs so that fronttorear fading of the main channels does not significantly affect the subwoofer level 2 Ch input mode To operate all five channels of the MHD9005 with a single pair of stereo inputs select the 2 Ch position on the Input Mode switch and connect a single pair of input cables to the Front input jacks only The Rear and Sub input jacks will remain unused In this mode the amplifier will route the signals connected to the Front inputs to the Front Rear and Subwoofer channels Fronttorear fading will not be available input Voltage switch A wide range of signal input voltages can be accommodated by each of the MHD9005s differentialbalanced inputs 200mV 8V RMS This wide range is split up into two subranges accessible via the Input Voltage switch located next to the Input Mode switch under the General Setup heading The Low position of the Input Voltage switch selects an input sensitivity range between 200mV and 2V for all the amplifier channels This means that the Input Sens rotary controls will operate within that voltage window If you are using an aftermarket source unit with preamp level outputs this is most likely the position that you will use regardless of what voltage output capability is claimed by the source unit The High position of the Input Voltage switch selects an input sensitivity range between 800mV and 8V This is for use with speakerlevel outputs from source units and small amplifiers found in many OEM factoryinstalled systems To use speakerlevel sources splice the speaker output wires of the source unit or small amplifier onto a pair of RCA plugs for each input pair or use the JL Audio ECS Speaker Wire to RCA adaptor XBCLRAIC2SW It is not necessary or advisable to use Line Output Converters with your MHD9005 amPliFier mounting oPtions The MHD9005 has two mounting options to ease in installation standard mounting The standard method of mounting requires removal of the four corner caps with the 4 mm hex wrench included with your amplifier Using appropriate mounting screws not included secure the amplifier in all four corners and replace the corner caps to cover the screws lateral mounting Feet Lateral Mounting Feet are also included with your MHD9005 to provide an alternative mounting option Each mounting foot should be attached to the bottom of the amplifier by screwing the provided bolt into the bottom of the amplifier and up into the corner cap with the supplied 25 mm hex wrench Next using appropriate mounting screws not included secure the amplifier by its four Lateral Mounting Feet Check before drilling any holes in your vessel to make sure that you will not be drilling through a gas tank brake line wiring harness or other vital vessel system Control Panel seCuritY CoVer The MHD9005 features a Control Panel Security Cover When installed the cover ensures that your amplifier settings are not accidentally changed while creating a clean aesthetic for the amplifier and your installation The control panel security cover is preinstalled at the factory and must be temporarily removed for access to the controls described throughout this manual The security cover is secured by a single 25 mm hexhead screw at the far right of the panel Loosen the hexhead screw to release the security cover it is not necessary to completely remove the screw To reinstall the security cover once all adjustments have been made insert the tongue on the covers left edge into the groove where the left side heatsink meets the control panel hinge the panel closed and secure the screw using the supplied 25 mm hex wrench Do not overtighten the screw
• Page 10 - English - : 10 JL Audio MHD9005 Owners Manual channel filter is a lowpass filter attenuates high frequencies For each filter the user can select from a shallow 12dBoctave filter slope or a more aggressive 24dBoctave slope 1 HighPass Filter Controls Front and Rear channels or LowPass Filter Control Sub Channel These switches allow you to select filter slopes or defeat the filters completely Off Defeats the filter completely Useful when using an external crossover such as one built into a head unit or signal processor 12dB Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 12 dB per octave Butterworth alignment 24dB Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 24 dB per octave Linkwitz Riley alignment Depending on the speaker system and the vessel different filter slopes may be required to produce a smooth transition between the sound of different speakers in the system In highpass mode the sharper 24dB setting will do a better job of protecting small speakers with limited power handling In lowpass mode the 24dB setting can also help by more aggressively removing lower midrange output from a subwoofer system The shallower 12dB octave setting allows for more output overlap between the speakers being crossed over In many cases this will result in a smoother blend or transition between speaker systems Experiment to find the slope or combination of slopes which best matches the acoustic requirements of your system 2 Filter Freq Hz Control This control selects the frequency at which the filter begins to attenuate the signal and refers specifically to the frequency at which output has been attenuated by 3dB The filter frequency markings surrounding this rotary control are for reference purposes and are generally accurate to within 13 octave or better If you would like to select the filter cutoff frequency with a higher level of precision consult the charts in Appendix B page 18 of this manual 80 Hz is a good starting point for most systems where a subwoofer is connected to the Subwoofer Channel and component systems or coaxials to the four main channels inFrasoniC Filter subwoofer Ch only The Infrasonic Filter is a 24 dBoctave high pass filter with a fixed cutoff frequency of 30 Hz This filter is designed to conserve amplifier power and protect subwoofer systems without audibly degrading the subbass output With ported enclosures the use of the Infrasonic Filter is highly recommended to protect the speakers from excessive excursion below box tuning With sealed enclosures the use of the filter is less necessary but can still help protect the speaker system from excessive excursion The Infrasonic Filter can be completely defeated by selecting the Off position on its switch This bypasses all signal from flowing through the circuit The output of the amplifier decreases for a given input voltage when the Input Range switch is placed in the High position The output increases with the switch in the Low position While this may sound counter intuitive it is correct as described CHannel Control seCtions To the left of the General Setup section on the Control Panel of the amplifer are three sets of controls one for the Rear Channel Controls one for the Front Channel Controls and one for the Subwoofer Channel Controls In each of these sections you will find a rotary control labeled Input Sens Input Sensitivity These controls are designed to match the input sensitivity of each channel section of the MHD9005 to the specific signal source that is feeding the amplifier These controls must be adjusted with care following the procedures outlined in this manual Failure to make correct adjustments can result in weak output excessive distortion andor undesirable noise in the audio output of the amplifier Note The Channel Control sections also house HighFilter or LowPass Filter and Filter Freq controls These are crossover filter controls and will be discussed in the next section of this manual This section will explain the Input Controls only input sens Controls Once the appropriate Input Voltage range has been selected in the General Setup section of the amplifier the Input Sens controls are used to match the source units output voltage to the input stage of each pair of amplifier channels for maximum clean output Rotating the control clockwise will result in higher sensitivity louder for a given input voltage Rotating the control counterclockwise will result in lower sensitivity quieter for a given input voltage To properly set each pair of amplifier channels for maximum clean output please refer to Appendix C pages 18 19 in this manual After using this procedure you can then adjust the relative level of each channel pair by adjusting the input sensitivity downward on any of the channel sections if they require attenuation to achieve the desired system balance Do not increase the Input Sens setting for any amplifier or channel section in the system beyond the maximum level established during the procedure outlined in Appendix C pages 18 19 Doing so will result in audible distortion and possible speaker damage Be aware that all three Input Sens adjustments will need to be made regardless of how many input cables are feeding the amplifier These controls will allow you to set the appropriate relative levels for the Front channels relative to the Rear channels and the Sub channel and any other amplifier channels in the system CrossoVer Controls Crossovers are groups of electronic filters designed to control the frequency ranges that each speaker in a system will be tasked with reproducing Proper crossover setup is critical to sound quality and reliability The MHD9005 has three individually adjustable filter controls one for the Front channels one for the Rear channels and another for the Sub channel The Front and Rear filters are highpass filters they attenuate low frequencies while the Sub
• Page 11 - English - : 10 JL Audio MHD9005 Owners Manual channel filter is a lowpass filter attenuates high frequencies For each filter the user can select from a shallow 12dBoctave filter slope or a more aggressive 24dBoctave slope 1 HighPass Filter Controls Front and Rear channels or LowPass Filter Control Sub Channel These switches allow you to select filter slopes or defeat the filters completely Off Defeats the filter completely Useful when using an external crossover such as one built into a head unit or signal processor 12dB Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 12 dB per octave Butterworth alignment 24dB Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 24 dB per octave Linkwitz Riley alignment Depending on the speaker system and the vessel different filter slopes may be required to produce a smooth transition between the sound of different speakers in the system In highpass mode the sharper 24dB setting will do a better job of protecting small speakers with limited power handling In lowpass mode the 24dB setting can also help by more aggressively removing lower midrange output from a subwoofer system The shallower 12dB octave setting allows for more output overlap between the speakers being crossed over In many cases this will result in a smoother blend or transition between speaker systems Experiment to find the slope or combination of slopes which best matches the acoustic requirements of your system 2 Filter Freq Hz Control This control selects the frequency at which the filter begins to attenuate the signal and refers specifically to the frequency at which output has been attenuated by 3dB The filter frequency markings surrounding this rotary control are for reference purposes and are generally accurate to within 13 octave or better If you would like to select the filter cutoff frequency with a higher level of precision consult the charts in Appendix B page 18 of this manual 80 Hz is a good starting point for most systems where a subwoofer is connected to the Subwoofer Channel and component systems or coaxials to the four main channels inFrasoniC Filter subwoofer Ch only The Infrasonic Filter is a 24 dBoctave high pass filter with a fixed cutoff frequency of 30 Hz This filter is designed to conserve amplifier power and protect subwoofer systems without audibly degrading the subbass output With ported enclosures the use of the Infrasonic Filter is highly recommended to protect the speakers from excessive excursion below box tuning With sealed enclosures the use of the filter is less necessary but can still help protect the speaker system from excessive excursion The Infrasonic Filter can be completely defeated by selecting the Off position on its switch This bypasses all signal from flowing through the circuit The output of the amplifier decreases for a given input voltage when the Input Range switch is placed in the High position The output increases with the switch in the Low position While this may sound counter intuitive it is correct as described CHannel Control seCtions To the left of the General Setup section on the Control Panel of the amplifer are three sets of controls one for the Rear Channel Controls one for the Front Channel Controls and one for the Subwoofer Channel Controls In each of these sections you will find a rotary control labeled Input Sens Input Sensitivity These controls are designed to match the input sensitivity of each channel section of the MHD9005 to the specific signal source that is feeding the amplifier These controls must be adjusted with care following the procedures outlined in this manual Failure to make correct adjustments can result in weak output excessive distortion andor undesirable noise in the audio output of the amplifier Note The Channel Control sections also house HighFilter or LowPass Filter and Filter Freq controls These are crossover filter controls and will be discussed in the next section of this manual This section will explain the Input Controls only input sens Controls Once the appropriate Input Voltage range has been selected in the General Setup section of the amplifier the Input Sens controls are used to match the source units output voltage to the input stage of each pair of amplifier channels for maximum clean output Rotating the control clockwise will result in higher sensitivity louder for a given input voltage Rotating the control counterclockwise will result in lower sensitivity quieter for a given input voltage To properly set each pair of amplifier channels for maximum clean output please refer to Appendix C pages 18 19 in this manual After using this procedure you can then adjust the relative level of each channel pair by adjusting the input sensitivity downward on any of the channel sections if they require attenuation to achieve the desired system balance Do not increase the Input Sens setting for any amplifier or channel section in the system beyond the maximum level established during the procedure outlined in Appendix C pages 18 19 Doing so will result in audible distortion and possible speaker damage Be aware that all three Input Sens adjustments will need to be made regardless of how many input cables are feeding the amplifier These controls will allow you to set the appropriate relative levels for the Front channels relative to the Rear channels and the Sub channel and any other amplifier channels in the system CrossoVer Controls Crossovers are groups of electronic filters designed to control the frequency ranges that each speaker in a system will be tasked with reproducing Proper crossover setup is critical to sound quality and reliability The MHD9005 has three individually adjustable filter controls one for the Front channels one for the Rear channels and another for the Sub channel The Front and Rear filters are highpass filters they attenuate low frequencies while the Sub
• Page 12 - English - : 12 JL Audio MHD9005 Owners Manual remote leVel Control oPtional With the addition of the optional Remote Level Control HDRLC you can control the level of the Subwoofer Channel of the MHD9005 from the front of the vessel The HDRLC connects to the jack labeled Remote Level Control on the Connection Panel of the amplifier using a standard telephone cable supplied with the HDRLC If desired multiple MHD amplifiers can be controlled from a single HDRLC controller using a simple phone line splitter and multiple phone cables When connected to the amplifier the HDRLC operates as follows At full counterclockwise rotation the audio will mute completely At full clockwise rotation the level will be the same as if the HDRLC was not connected at all In other words it operates strictly as a level attenuator When no HDRLC is connected the Level Control circuit is defeated The RBC1 Remote Bass Control used with JL Audio Slash Slash v2 eSeries ASeries and GSeries amplifiers is NOT compatible with the HDMHD Series amplifiers If you attempt to connect an RBC1 to an HD amplifer the control will not work You must use the HDRLC controller sPeaker outPuts The MHD9005 employs JL Audios exclusive Regulated Intelligent Power Supply RIPS design The operation of the RIPS system is independent for each channel section This sophisticated power supply allows the amplifier to produce its optimum power into higher impedances as well as low impedances The RIPSequipped MHD9005 gives you the freedom to use a variety of speaker configurations that achieve final nominal impedances between 15 4Ω per channel in stereo while maintaining 75 100W x 4 of clean power output When bridged each main channel pair will optimize output at 150200 watts between 3 8Ω The mono subwoofer channel will deliver its full 500W output into any impedance between 154Ω The operation of the RIPS circuitry is entirely automatic and adjusts itself every time the amplifier is turned on There are no user controls to configure The system operates through multiple stages of impedance optimization choosing the stage most appropriate to the actual impedance of the speakers you connect to it If you connect a load higher than 4Ω nominal per channel in stereo mode or 8Ω in bridged mode power will drop by half with every doubling of impedance above 4Ω stereo 8Ω mono If you connect a load lower than 15Ω nominal per channel in stereo mode or 3Ω in bridged mode the amplifier protection circuitry activates a safe mode which reduces amplifier power to protect the circuitry from failure the LED status indicator on the control panel will light up amber to indicate that this has happened See page 15 for details biamPliFied sYstems Biamplified systems are defined as systems in which separate amplifier channels drive low frequency LF and highfrequency HF speakers and are separately filtered to send appropriate frequency ranges to each speaker system The most common application of biamplification in mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels The MHD9005 can be easily configured to drive a complete biamplified system consisting of a subwoofer and four main speakers or a subwoofer and two main speakers biamplified system with one mHd9005 driving four main speakers plus subwoofer 5Channel mode In this configuration the Front channels of the MHD9005 will drive front component speakers stereo 100W x 2 4Ω with high pass filtering The Rear channels will drive rear component speakers in stereo 100W x 2 4Ω with highpass filtering The subwoofer channel will drive the subwoofer system 500W x 1 154Ω with lowpass filtering Once the input sections have been configured appropriately go to the Front Channel Controls Section Select 12dB or 24dB on the HighPass Filter and an appropriate Filter Freq 8090 Hz is a good starting point Next turn your attention to the Rear Channel Controls Section and select 12dB or 24dB HighPass Filter switch and an appropriate Filter Freq again 8090 Hz is a good starting point Finally in the Subwoofer Channel Controls Section select 12dB or 24dB on the LowPass Filter Switch and a Filter Freq of 8090 Hz After proper adjustment of the MHD9005s Input Range and Input Sens controls you can fine tune filter frequencies and slopes and attenuate each channel section to achieve proper balance biamplified system with one mHd9005 driving two main speakers plus subwoofer 3Channel mode In this configuration the Front channels of the MHD9005 will be bridged to drive the left front component speaker system 150W x 1 4Ω with highpass filtering The Rear channels will be bridged to drive the right front component speaker system 150W x 1 4Ω also with highpass filtering The Subwoofer channel will drive the subwoofer system 500W x 1 154Ω with lowpass filtering For information on proper bridging techniques refer to the section titled Bridging Considerations in this manual page 14 Once the input sections have been configured appropriately go to the Front Channel Controls Section Select 12dB or 24dB on the HighPass Filter and an appropriate Filter Freq 8090 Hz is a good starting point Next turn your attention to the Rear Channel Controls section and set it exactly the same as you set the Front Channel Controls Finally in the Subwoofer Channel Controls section select 12dB or 24dB on the LowPass Filter switch and a Filter Freq of 8090 Hz After proper adjustment of the MHD9005s Input Range and Input Sens controls you can fine tune filter frequencies and slopes and attenuate each channel section to achieve proper balance Keep in mind that the left and right front speakers will have independent Input Sens controls in this configuration and these need to be carefully matched for proper stereo performance
• Page 13 - English - : 12 JL Audio MHD9005 Owners Manual remote leVel Control oPtional With the addition of the optional Remote Level Control HDRLC you can control the level of the Subwoofer Channel of the MHD9005 from the front of the vessel The HDRLC connects to the jack labeled Remote Level Control on the Connection Panel of the amplifier using a standard telephone cable supplied with the HDRLC If desired multiple MHD amplifiers can be controlled from a single HDRLC controller using a simple phone line splitter and multiple phone cables When connected to the amplifier the HDRLC operates as follows At full counterclockwise rotation the audio will mute completely At full clockwise rotation the level will be the same as if the HDRLC was not connected at all In other words it operates strictly as a level attenuator When no HDRLC is connected the Level Control circuit is defeated The RBC1 Remote Bass Control used with JL Audio Slash Slash v2 eSeries ASeries and GSeries amplifiers is NOT compatible with the HDMHD Series amplifiers If you attempt to connect an RBC1 to an HD amplifer the control will not work You must use the HDRLC controller sPeaker outPuts The MHD9005 employs JL Audios exclusive Regulated Intelligent Power Supply RIPS design The operation of the RIPS system is independent for each channel section This sophisticated power supply allows the amplifier to produce its optimum power into higher impedances as well as low impedances The RIPSequipped MHD9005 gives you the freedom to use a variety of speaker configurations that achieve final nominal impedances between 15 4Ω per channel in stereo while maintaining 75 100W x 4 of clean power output When bridged each main channel pair will optimize output at 150200 watts between 3 8Ω The mono subwoofer channel will deliver its full 500W output into any impedance between 154Ω The operation of the RIPS circuitry is entirely automatic and adjusts itself every time the amplifier is turned on There are no user controls to configure The system operates through multiple stages of impedance optimization choosing the stage most appropriate to the actual impedance of the speakers you connect to it If you connect a load higher than 4Ω nominal per channel in stereo mode or 8Ω in bridged mode power will drop by half with every doubling of impedance above 4Ω stereo 8Ω mono If you connect a load lower than 15Ω nominal per channel in stereo mode or 3Ω in bridged mode the amplifier protection circuitry activates a safe mode which reduces amplifier power to protect the circuitry from failure the LED status indicator on the control panel will light up amber to indicate that this has happened See page 15 for details biamPliFied sYstems Biamplified systems are defined as systems in which separate amplifier channels drive low frequency LF and highfrequency HF speakers and are separately filtered to send appropriate frequency ranges to each speaker system The most common application of biamplification in mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels The MHD9005 can be easily configured to drive a complete biamplified system consisting of a subwoofer and four main speakers or a subwoofer and two main speakers biamplified system with one mHd9005 driving four main speakers plus subwoofer 5Channel mode In this configuration the Front channels of the MHD9005 will drive front component speakers stereo 100W x 2 4Ω with high pass filtering The Rear channels will drive rear component speakers in stereo 100W x 2 4Ω with highpass filtering The subwoofer channel will drive the subwoofer system 500W x 1 154Ω with lowpass filtering Once the input sections have been configured appropriately go to the Front Channel Controls Section Select 12dB or 24dB on the HighPass Filter and an appropriate Filter Freq 8090 Hz is a good starting point Next turn your attention to the Rear Channel Controls Section and select 12dB or 24dB HighPass Filter switch and an appropriate Filter Freq again 8090 Hz is a good starting point Finally in the Subwoofer Channel Controls Section select 12dB or 24dB on the LowPass Filter Switch and a Filter Freq of 8090 Hz After proper adjustment of the MHD9005s Input Range and Input Sens controls you can fine tune filter frequencies and slopes and attenuate each channel section to achieve proper balance biamplified system with one mHd9005 driving two main speakers plus subwoofer 3Channel mode In this configuration the Front channels of the MHD9005 will be bridged to drive the left front component speaker system 150W x 1 4Ω with highpass filtering The Rear channels will be bridged to drive the right front component speaker system 150W x 1 4Ω also with highpass filtering The Subwoofer channel will drive the subwoofer system 500W x 1 154Ω with lowpass filtering For information on proper bridging techniques refer to the section titled Bridging Considerations in this manual page 14 Once the input sections have been configured appropriately go to the Front Channel Controls Section Select 12dB or 24dB on the HighPass Filter and an appropriate Filter Freq 8090 Hz is a good starting point Next turn your attention to the Rear Channel Controls section and set it exactly the same as you set the Front Channel Controls Finally in the Subwoofer Channel Controls section select 12dB or 24dB on the LowPass Filter switch and a Filter Freq of 8090 Hz After proper adjustment of the MHD9005s Input Range and Input Sens controls you can fine tune filter frequencies and slopes and attenuate each channel section to achieve proper balance Keep in mind that the left and right front speakers will have independent Input Sens controls in this configuration and these need to be carefully matched for proper stereo performance
• Page 14 - English - : 14 JL Audio MHD9005 Owners Manual status led ProteCtion CirCuitrY There is a single multicolor LED on the control panel of the amplifier to indicate the amplifiers operating status This LEDs behavior is as follows 1 Flashing Green amplifier is powering up audio output is muted 2 Constant Green amplifier is on and functioning normally audio output is active 3 Constant Red lights to indicate that the amplifier has exceeded its safe operating temperature putting the amplifier into a self protection mode which temporarily reduces the peak power output of the amplifier The red light will turn green and the amplifier will return to fullpower operating mode when its temperature returns to a safe level 3 Constant Amber yellow lights to indicate that at least one channel is in overcurrent protection mode This could mean that the impedance of the speaker load connected to the amplifier is lower than the optimum load impedance range for the amplifier When this light is on a protection circuit engages and reduces the power output of the channels experiencing the problem This can manifest itself as audible distortion The amber indicator will also light when a shortcircuit is detected in the speaker wiring this can be a short between the positive and negative speaker wires or between either speaker wire and the vessel chassis This can be used to diagnose a shortcircuit by only connecting one of the amplifier sections at a time Front or Rear or Sub channels The amber LED will light when you connect the section that is experiencing the problem and turn the volume up Note that a short in the speaker wiring may show an alternating redgreen status light with no signal volume down 4 Alternating Red and Green lights to indicate that the amplifier is experiencing a fault that may require service of the amplifier its wiring or the vessels charging system Audio is muted when this fault occurs The most likely cause of this fault is a low supply voltage condition If battery voltage drops below 85 volts at any point the amplifier except for the Status LED will shut itself off to protect itself and the vessels charging system If the Remote Turn On voltage drops below 6 volts the Status LED will also turn off The amplifier will turn back on automatically when voltage climbs back above 9 volts This shutdown and turnon behavior may happen in a rapid cycle when bassheavy program material causes a weak charging system to momentarily dip too low If this is happening in your system have your charging system inspected to make sure it is working properly If no problem is found with the supply voltage to the amplifier and you are still seeing alternating Red and Green on the Status LED check that there are no shortcircuits to chassis ground in any of the speaker wiring in the vessel Disconnect speaker connectors from the amplifier onebyone to check If no problem is found with the supply or remote voltage disconnect everything except powergroundremote If the amplifier is then turned on and displays an alternating red green the amplifier needs service For more information on troubleshooting this amplifier refer to Appendix D pages 20 21 bridging Considerations Bridging is the practice of combining the output of two amplifier channels to drive a single load When bridged each channel produces signals of equal magnitude but opposite polarity The combined output of the two channels provides twice the output voltage available from a single channel The MHD9005 has been designed for bridging of its two main channel pairs without the need for input inversion adaptors The mono subwoofer channel cannot be bridged to another mono channel To bridge either pair of main channels use the Left and Right speaker connectors only the Left and Right remain unused Then connect a mono signal to both left and right RCA inputs for that channel pair This requires an RCA YAdaptor sold separately because a bridged pair of channels requires that both amplifier channels of the bridged pair receive input Connection of only one RCA input will result in reduced power output increased distortion and can cause the amplifier to overheat When bridged each channel pair will deliver optimum power into a 38Ω load Operating bridged channel pairs into a load lower than 3Ω is not recommended speaker Connector Plugs There are three speaker connector plugs on the MHD9005 one for the front channels one for the rear channels and one for the subwoofer channel To connect the speaker wires to the amplifier unplug the speaker connector plugs from the amplifier chassis pull back firmly and back out the set screws on each connector plug using the supplied 25 mm hex wrench Strip 38 inch 10 mm of insulation from the end of each wire and insert the bare wire into the receptacle on the speaker connector plug seating it firmly so that no bare wire is exposed While holding each wire in place tighten each set screw firmly taking care not to strip the head of the screw Speaker loads below 15Ω nominal per channel in stereo or 3Ω nominal in bridged mode are not recommended and may cause the amplifier output to distort excessively
• Page 15 - English - : 14 JL Audio MHD9005 Owners Manual status led ProteCtion CirCuitrY There is a single multicolor LED on the control panel of the amplifier to indicate the amplifiers operating status This LEDs behavior is as follows 1 Flashing Green amplifier is powering up audio output is muted 2 Constant Green amplifier is on and functioning normally audio output is active 3 Constant Red lights to indicate that the amplifier has exceeded its safe operating temperature putting the amplifier into a self protection mode which temporarily reduces the peak power output of the amplifier The red light will turn green and the amplifier will return to fullpower operating mode when its temperature returns to a safe level 3 Constant Amber yellow lights to indicate that at least one channel is in overcurrent protection mode This could mean that the impedance of the speaker load connected to the amplifier is lower than the optimum load impedance range for the amplifier When this light is on a protection circuit engages and reduces the power output of the channels experiencing the problem This can manifest itself as audible distortion The amber indicator will also light when a shortcircuit is detected in the speaker wiring this can be a short between the positive and negative speaker wires or between either speaker wire and the vessel chassis This can be used to diagnose a shortcircuit by only connecting one of the amplifier sections at a time Front or Rear or Sub channels The amber LED will light when you connect the section that is experiencing the problem and turn the volume up Note that a short in the speaker wiring may show an alternating redgreen status light with no signal volume down 4 Alternating Red and Green lights to indicate that the amplifier is experiencing a fault that may require service of the amplifier its wiring or the vessels charging system Audio is muted when this fault occurs The most likely cause of this fault is a low supply voltage condition If battery voltage drops below 85 volts at any point the amplifier except for the Status LED will shut itself off to protect itself and the vessels charging system If the Remote Turn On voltage drops below 6 volts the Status LED will also turn off The amplifier will turn back on automatically when voltage climbs back above 9 volts This shutdown and turnon behavior may happen in a rapid cycle when bassheavy program material causes a weak charging system to momentarily dip too low If this is happening in your system have your charging system inspected to make sure it is working properly If no problem is found with the supply voltage to the amplifier and you are still seeing alternating Red and Green on the Status LED check that there are no shortcircuits to chassis ground in any of the speaker wiring in the vessel Disconnect speaker connectors from the amplifier onebyone to check If no problem is found with the supply or remote voltage disconnect everything except powergroundremote If the amplifier is then turned on and displays an alternating red green the amplifier needs service For more information on troubleshooting this amplifier refer to Appendix D pages 20 21 bridging Considerations Bridging is the practice of combining the output of two amplifier channels to drive a single load When bridged each channel produces signals of equal magnitude but opposite polarity The combined output of the two channels provides twice the output voltage available from a single channel The MHD9005 has been designed for bridging of its two main channel pairs without the need for input inversion adaptors The mono subwoofer channel cannot be bridged to another mono channel To bridge either pair of main channels use the Left and Right speaker connectors only the Left and Right remain unused Then connect a mono signal to both left and right RCA inputs for that channel pair This requires an RCA YAdaptor sold separately because a bridged pair of channels requires that both amplifier channels of the bridged pair receive input Connection of only one RCA input will result in reduced power output increased distortion and can cause the amplifier to overheat When bridged each channel pair will deliver optimum power into a 38Ω load Operating bridged channel pairs into a load lower than 3Ω is not recommended speaker Connector Plugs There are three speaker connector plugs on the MHD9005 one for the front channels one for the rear channels and one for the subwoofer channel To connect the speaker wires to the amplifier unplug the speaker connector plugs from the amplifier chassis pull back firmly and back out the set screws on each connector plug using the supplied 25 mm hex wrench Strip 38 inch 10 mm of insulation from the end of each wire and insert the bare wire into the receptacle on the speaker connector plug seating it firmly so that no bare wire is exposed While holding each wire in place tighten each set screw firmly taking care not to strip the head of the screw Speaker loads below 15Ω nominal per channel in stereo or 3Ω nominal in bridged mode are not recommended and may cause the amplifier output to distort excessively
• Page 16 - English - : 16 JL Audio MHD9005 Owners Manual serViCing Your Jl audio amPliFier If your amplifier fails or malfunctions please return it to your authorized JL Audio dealer so that it may be sent in to JL Audio for service There are no user serviceable parts or fuses inside the amplifier The unique nature of the circuitry in the JL Audio amplifiers requires specifically trained service personnel Do not attempt to service the amplifier yourself or through unauthorized repair facilities This will not only void the warranty but may result in the creation of more problems within the amplifier If you have any questions about the installation or setup of the amplifier not covered in this manual please contact your dealer or technical support Jl audio technical support 9 54 4 4 3 110 0 900 AM 530 PM Eastern Time Zone Monday Friday aPPendix a mHd9005 specifications Amplifier Topology Class D switching type with patented SingleCycle Control technology Power Supply Pulse width modulationregulated switching power supply Recommended Fuse Value Type 60A AFS AGU or MaxiFuse Rated Power Main Channels Stereo 100W RMS x 4 4Ω 11V 145V 75W RMS x 4 153Ω 11V 145V Rated Power Main Channels Bridged 200W RMS x 2 8Ω 11V 145V 150W RMS x 2 36Ω 11V 145V Rated Power Subwoofer Channel 500W RMS x 1 154Ω 11V 145V THD at Rated Power Main Channels lt003 4Ω per channel Subwoofer Channel lt005 4Ω Average at 1 kHz Signal to Noise Ratio 20 kHz Bandwidth Referred to Rated Power 108 dBA Referred to 1 Watt 88 dBA Frequency Response Main Channels 12 Hz 28 kHz 0 1dB Frequency Response Subwoofer Channel 12 Hz 10 kHz 0 1dB Damping Factor Main Channels gt400 4Ω per ch 50 Hz gt200 2Ω per ch 50 Hz Damping Factor Subwoofer Channel gt800 4Ω 50 Hz gt400 2Ω 50 Hz Crossover Filters HighPass Filters Front Channels and Rear Channels LowPass Filter Subwoofer Channel Filter Type all channels 12 dBoctave Butterworth or 24 dBoctave LinkwitzRiley Cutoff Freq Range Continuously variable 50 500 Hz input sections No of Inputs Three Stereo Pairs Front Rear and Sub Input Type Differentialbalanced with RCA jack inputs Input Range Switchable from 200mV 2V RMS Low to 800mV 8V RMS High Chassis dimensions lxwxH 1074 in x 785 in x 193 in 273 mm x 1995 mm x 49 mm Dimensions do not include connectors Due to ongoing product development all specifications are subject to change without notice
• Page 17 - English - : 16 JL Audio MHD9005 Owners Manual serViCing Your Jl audio amPliFier If your amplifier fails or malfunctions please return it to your authorized JL Audio dealer so that it may be sent in to JL Audio for service There are no user serviceable parts or fuses inside the amplifier The unique nature of the circuitry in the JL Audio amplifiers requires specifically trained service personnel Do not attempt to service the amplifier yourself or through unauthorized repair facilities This will not only void the warranty but may result in the creation of more problems within the amplifier If you have any questions about the installation or setup of the amplifier not covered in this manual please contact your dealer or technical support Jl audio technical support 9 54 4 4 3 110 0 900 AM 530 PM Eastern Time Zone Monday Friday aPPendix a mHd9005 specifications Amplifier Topology Class D switching type with patented SingleCycle Control technology Power Supply Pulse width modulationregulated switching power supply Recommended Fuse Value Type 60A AFS AGU or MaxiFuse Rated Power Main Channels Stereo 100W RMS x 4 4Ω 11V 145V 75W RMS x 4 153Ω 11V 145V Rated Power Main Channels Bridged 200W RMS x 2 8Ω 11V 145V 150W RMS x 2 36Ω 11V 145V Rated Power Subwoofer Channel 500W RMS x 1 154Ω 11V 145V THD at Rated Power Main Channels lt003 4Ω per channel Subwoofer Channel lt005 4Ω Average at 1 kHz Signal to Noise Ratio 20 kHz Bandwidth Referred to Rated Power 108 dBA Referred to 1 Watt 88 dBA Frequency Response Main Channels 12 Hz 28 kHz 0 1dB Frequency Response Subwoofer Channel 12 Hz 10 kHz 0 1dB Damping Factor Main Channels gt400 4Ω per ch 50 Hz gt200 2Ω per ch 50 Hz Damping Factor Subwoofer Channel gt800 4Ω 50 Hz gt400 2Ω 50 Hz Crossover Filters HighPass Filters Front Channels and Rear Channels LowPass Filter Subwoofer Channel Filter Type all channels 12 dBoctave Butterworth or 24 dBoctave LinkwitzRiley Cutoff Freq Range Continuously variable 50 500 Hz input sections No of Inputs Three Stereo Pairs Front Rear and Sub Input Type Differentialbalanced with RCA jack inputs Input Range Switchable from 200mV 2V RMS Low to 800mV 8V RMS High Chassis dimensions lxwxH 1074 in x 785 in x 193 in 273 mm x 1995 mm x 49 mm Dimensions do not include connectors Due to ongoing product development all specifications are subject to change without notice
• Page 18 - English - : 18 JL Audio MHD9005 Owners Manual the ninestep Procedure follow this procedure for each pair of channels 1 Disconnect the Speaker Connector Plugs 2 Turn off all processing on the source unit basstreble loudness EQ etc Set fader control to center position and subwoofer level control to 34 of maximum if used to drive the MHD9005 Disconnect the HDRLC Remote Level Control temporarily if one is being used 3 Switch the Input Voltage to Low and turn the Input Sens control on both sets of channels all the way down 4 Set the source unit volume to 34 of full volume If the subwoofer channel is being driven by a source units dedicated subwoofer output also adjust the source units subwoofer level control to 34 of maximum output This will allow for reasonable gain overlap with moderate clipping at full volume 5 Using the chart below determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to each set of outputs 6 Verify that you have disconnected the Speaker Connector Plugs before proceeding Play a track with an appropriate sine wave within the frequency range to be amplified by each set of channels at 34 source unit volume 7 Connect the AC voltmeter to the Front Speaker Outputs or Rear Speaker Outputs connectors of the amplifier If the channel pair is operating in stereo it is only necessary to measure one channel in the pair If bridged make sure you test the voltage at the correct connectors L and R 8 Increase the Input Sens control until the target voltage is delivered for that set of channels If excessive voltage is read with the control at minimum full counterclockwise switch the Input Voltage switch to High and readjust 9 Once you have adjusted each set of channels to its maximum unclipped output level reconnect the speakers The Input Sens controls can now be adjusted downward any set of channels requires attenuation to achieve the desired system balance nom impedance Front or rear CHannels subwooFer CHannel stereo bridged mono 8Ω 200 V 400 V 447 V 6Ω 200 V 320 V 447 V 4Ω 200 V 246 V 447 V 3Ω 160 V 212 V 387 V 2Ω 123 V not recommended 316 V 15Ω 106 V not recommended 274 V aPPendix b Precise Frequency selection Chart Filter Freq detent Panel actual number marking Freq Hz Full counterclockwise 53 01 5053 02 53 03 53 04 53 05 54 06 55 07 57 08 58 09 6060 10 62 11 64 12 66 13 69 14 71 15 74 16 77 17 8080 18 85 19 86 20 90 21 95 22 100 23 104 24 110 25 12 oclock116 26 123 27 131 28 141 29 151 30 165 31 180 32 200 33 224 34 250 248 35 293 36 347 37 422 38 459 39 500 504 40 508 41 508 Fullclockwise 508 aPPendix C input sensitivity level setting JL Audio amplifiers utilizing the Regulated Intelligent Power Supply RIPS allow delivery of their rated power when connected to any load impedance from 15 4Ω per channel and when connected to a charging system with any voltage from 11 145V This design is beneficial for many reasons One of these reasons is ease of setup Because each JL Audio amplifier will always deliver the same amount of power within its operational range of supply voltages the maximum unclipped output is very predictable This makes setting the gain structure via the input sensitivity controls very simple Following the directions below will allow the user to adjust the input sensitivity of the amplifiers simply and easily in just a few minutes using equipment which is commonly available in installation bays necessary equipment Digital AC Voltmeter CD with a sinewave test tone recorded at 0 dB reference level in the frequency range to be amplified for that set of channels 50 Hz for subwoofer channels 1 kHz for a midrange application The CleanSweep Calibration Disc contains the appropriate test tones and is available for sale at httpstorejlaudiocom Do not use attenuated test tones 10 dB 20 dB etc Do not increase any Input Sens setting in the system beyond the maximum level established during this procedure Doing so will result in audible distortion and possible speaker damage It will be necessary to readjust the Input Sens for the affected channels if any equalizer boost is activated after setting the Input Sens with this procedure This applies to any EQ boost circuit source unit tone controls or EQ circuits EQ cuts will not require readjustment
• Page 19 - English - : 18 JL Audio MHD9005 Owners Manual the ninestep Procedure follow this procedure for each pair of channels 1 Disconnect the Speaker Connector Plugs 2 Turn off all processing on the source unit basstreble loudness EQ etc Set fader control to center position and subwoofer level control to 34 of maximum if used to drive the MHD9005 Disconnect the HDRLC Remote Level Control temporarily if one is being used 3 Switch the Input Voltage to Low and turn the Input Sens control on both sets of channels all the way down 4 Set the source unit volume to 34 of full volume If the subwoofer channel is being driven by a source units dedicated subwoofer output also adjust the source units subwoofer level control to 34 of maximum output This will allow for reasonable gain overlap with moderate clipping at full volume 5 Using the chart below determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to each set of outputs 6 Verify that you have disconnected the Speaker Connector Plugs before proceeding Play a track with an appropriate sine wave within the frequency range to be amplified by each set of channels at 34 source unit volume 7 Connect the AC voltmeter to the Front Speaker Outputs or Rear Speaker Outputs connectors of the amplifier If the channel pair is operating in stereo it is only necessary to measure one channel in the pair If bridged make sure you test the voltage at the correct connectors L and R 8 Increase the Input Sens control until the target voltage is delivered for that set of channels If excessive voltage is read with the control at minimum full counterclockwise switch the Input Voltage switch to High and readjust 9 Once you have adjusted each set of channels to its maximum unclipped output level reconnect the speakers The Input Sens controls can now be adjusted downward any set of channels requires attenuation to achieve the desired system balance nom impedance Front or rear CHannels subwooFer CHannel stereo bridged mono 8Ω 200 V 400 V 447 V 6Ω 200 V 320 V 447 V 4Ω 200 V 246 V 447 V 3Ω 160 V 212 V 387 V 2Ω 123 V not recommended 316 V 15Ω 106 V not recommended 274 V aPPendix b Precise Frequency selection Chart Filter Freq detent Panel actual number marking Freq Hz Full counterclockwise 53 01 5053 02 53 03 53 04 53 05 54 06 55 07 57 08 58 09 6060 10 62 11 64 12 66 13 69 14 71 15 74 16 77 17 8080 18 85 19 86 20 90 21 95 22 100 23 104 24 11 0 25 12 oclock116 26 123 27 131 28 141 29 151 30 165 31 180 32 200 33 224 34 250 248 35 293 36 347 37 422 38 459 39 500 504 40 508 41 508 Fullclockwise 508 aPPendix C input sensitivity level setting JL Audio amplifiers utilizing the Regulated Intelligent Power Supply RIPS allow delivery of their rated power when connected to any load impedance from 15 4Ω per channel and when connected to a charging system with any voltage from 11 145V This design is beneficial for many reasons One of these reasons is ease of setup Because each JL Audio amplifier will always deliver the same amount of power within its operational range of supply voltages the maximum unclipped output is very predictable This makes setting the gain structure via the input sensitivity controls very simple Following the directions below will allow the user to adjust the input sensitivity of the amplifiers simply and easily in just a few minutes using equipment which is commonly available in installation bays necessary equipment Digital AC Voltmeter CD with a sinewave test tone recorded at 0 dB reference level in the frequency range to be amplified for that set of channels 50 Hz for subwoofer channels 1 kHz for a midrange application The CleanSweep Calibration Disc contains the appropriate test tones and is available for sale at httpstorejlaudiocom Do not use attenuated test tones 10 dB 20 dB etc Do not increase any Input Sens setting in the system beyond the maximum level established during this procedure Doing so will result in audible distortion and possible speaker damage It will be necessary to readjust the Input Sens for the affected channels if any equalizer boost is activated after setting the Input Sens with this procedure This applies to any EQ boost circuit source unit tone controls or EQ circuits EQ cuts will not require readjustment
• Page 20 - English - : 20 JL Audio MHD9005 Owners Manual my amplifier shuts off once in a while usually at higher volumes Check your voltage source and grounding point The power supply of the MHD9005 will operate with charging system voltages down to 9V Shutdown problems at higher volume levels can occur when the charging system voltage drops below 9V These dips can be of very short duration making them extremely difficult to detect with a common DC voltmeter To ensure proper voltage inspect all wiring and termination points It may also be necessary to upgrade the ground wire connecting the battery to the vessels chassis and the power wire connecting the alternator to the battery Many vessels employ small 10 AWG 6 AWG wire to ground the battery to the vessels chassis and to connect the alternator to the battery To prevent voltage drops these wires should be upgraded to 4 AWG when installing amplifier systems with main fuse ratings above 60A Grounding problems are the leading cause of misdiagnosed amplifier failures my amplifier turns on but there is no output Check the input signal using an AC voltmeter to measure the voltage from the source unit while an appropriate test tone is played through the source unit disconnect the input cables from the amplifier prior to this test The frequency used should be in the range that is to be amplified by the amplifier example 50 Hz for a sub bass application or 1 kHz for a full range highpass application A steady sufficient voltage between 200mV and 80volts should be present at the output of the signal cables Check the output of the amplifier Using the procedure explained in the previous check item after plugging the input cables back into the amplifier test for output at the speaker outputs of the amplifier Unless you enjoy test tones at high levels it is a good idea to remove the Speaker Connector Plugs from the amplifier while doing this Turn the volume up approximately half way 5V or more should be measured at the speaker outputs This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume If you are reading sufficient voltage check your speaker connections as explained below Check to ensure that the speaker wires are making a good connection with the metal inside the Speaker Connector Plugs The speaker wire connectors are designed to accept up to 12 AWG wire Make sure to strip the wire to allow for a sufficient connection with the metal inside each terminal How do i properly set the input sensitivity on my amplifier Please refer to Appendix C pages 18 19 to set the input sensitivity for maximum lowdistortion output my amplifier doesnt turn on Check the fuses not just visually but with a continuity meter It is possible for a fuse to have poor internal connections that cannot be found by visual inspection It is best to take the fuse out of the holder for testing If no problem is found with the fuse inspect the fuseholder Check the integrity of the connections made to each of the 12VDC Ground and Remote terminals Ensure that no wire insulation is pinched by the terminal set screw and that each connection is tight Check to make sure there is 12V at the Remote connection of the amplifier In some cases the turnon lead from the source unit is insufficient to turn on multiple devices and the use of a relay is required To test for this problem jump the 12VDC wire to the Remote terminal to see if the amplifier turns on i get a distorted attenuated sound coming out of the speakers Check the speaker wires for a possible short either between the positive and negative leads or between either speaker lead and the vessels chassis ground If a short is present you will experience distorted andor attenuated output The Status LED will turn amber yellow in this situation It may be helpful to disconnect the speaker wires from the amplifier and use a different set of wires connected to a test speaker Check the nominal load impedance to verify that each channel of the amplifier is driving a load equal to or greater than 15 ohms in stereo mode 3 ohms bridged Check the input signal and input signal cables to make sure signal is present at the Amplifier Inputs and the cables are not pinched or loose It may be helpful to try a different set of cables andor a different signal source to be sure Reset the amplifier by removing the power plug then wait ten seconds and reconnect the power plug my amplifiers output fluctuates when i tap on it or hit a bump Check the connections to the amplifier Make sure that the insulation for all wires has been stripped back far enough to allow a good contact area inside the connector plugs Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier aPPendix d troublesHooting
• Page 21 - English - : 20 JL Audio MHD9005 Owners Manual my amplifier shuts off once in a while usually at higher volumes Check your voltage source and grounding point The power supply of the MHD9005 will operate with charging system voltages down to 9V Shutdown problems at higher volume levels can occur when the charging system voltage drops below 9V These dips can be of very short duration making them extremely difficult to detect with a common DC voltmeter To ensure proper voltage inspect all wiring and termination points It may also be necessary to upgrade the ground wire connecting the battery to the vessels chassis and the power wire connecting the alternator to the battery Many vessels employ small 10 AWG 6 AWG wire to ground the battery to the vessels chassis and to connect the alternator to the battery To prevent voltage drops these wires should be upgraded to 4 AWG when installing amplifier systems with main fuse ratings above 60A Grounding problems are the leading cause of misdiagnosed amplifier failures my amplifier turns on but there is no output Check the input signal using an AC voltmeter to measure the voltage from the source unit while an appropriate test tone is played through the source unit disconnect the input cables from the amplifier prior to this test The frequency used should be in the range that is to be amplified by the amplifier example 50 Hz for a sub bass application or 1 kHz for a full range highpass application A steady sufficient voltage between 200mV and 80volts should be present at the output of the signal cables Check the output of the amplifier Using the procedure explained in the previous check item after plugging the input cables back into the amplifier test for output at the speaker outputs of the amplifier Unless you enjoy test tones at high levels it is a good idea to remove the Speaker Connector Plugs from the amplifier while doing this Turn the volume up approximately half way 5V or more should be measured at the speaker outputs This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume If you are reading sufficient voltage check your speaker connections as explained below Check to ensure that the speaker wires are making a good connection with the metal inside the Speaker Connector Plugs The speaker wire connectors are designed to accept up to 12 AWG wire Make sure to strip the wire to allow for a sufficient connection with the metal inside each terminal How do i properly set the input sensitivity on my amplifier Please refer to Appendix C pages 18 19 to set the input sensitivity for maximum lowdistortion output my amplifier doesnt turn on Check the fuses not just visually but with a continuity meter It is possible for a fuse to have poor internal connections that cannot be found by visual inspection It is best to take the fuse out of the holder for testing If no problem is found with the fuse inspect the fuseholder Check the integrity of the connections made to each of the 12VDC Ground and Remote terminals Ensure that no wire insulation is pinched by the terminal set screw and that each connection is tight Check to make sure there is 12V at the Remote connection of the amplifier In some cases the turnon lead from the source unit is insufficient to turn on multiple devices and the use of a relay is required To test for this problem jump the 12VDC wire to the Remote terminal to see if the amplifier turns on i get a distorted attenuated sound coming out of the speakers Check the speaker wires for a possible short either between the positive and negative leads or between either speaker lead and the vessels chassis ground If a short is present you will experience distorted andor attenuated output The Status LED will turn amber yellow in this situation It may be helpful to disconnect the speaker wires from the amplifier and use a different set of wires connected to a test speaker Check the nominal load impedance to verify that each channel of the amplifier is driving a load equal to or greater than 15 ohms in stereo mode 3 ohms bridged Check the input signal and input signal cables to make sure signal is present at the Amplifier Inputs and the cables are not pinched or loose It may be helpful to try a different set of cables andor a different signal source to be sure Reset the amplifier by removing the power plug then wait ten seconds and reconnect the power plug my amplifiers output fluctuates when i tap on it or hit a bump Check the connections to the amplifier Make sure that the insulation for all wires has been stripped back far enough to allow a good contact area inside the connector plugs Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier aPPendix d troublesHooting
• Page 22: 22 JL Audio MHD9005 Owners Manual installation notes use this diagram to document your amplifiers switch and control positions
• Page 23: 22 JL Audio MHD9005 Owners Manual installation notes use this diagram to document your amplifiers switch and control positions
• Page 24 - English - : limited warrantY marine ProduCts usa JL AUDIO warrants this product to be free of defects in materials and workmanship for a period of two 2 years from the original date of purchase This warranty is not transferable and applies only to the original purchaser from an authorized JL AUDIO dealer Should service be necessary under this warranty for any reason due to manufacturing defect or malfunction JL AUDIO will at its discretion repair or replace the defective product with new or remanufactured product at no charge Damage caused by the following is not covered under warranty accident misuse abuse product modification or neglect failure to follow installation instructions unauthorized repair attempts misrepresentations by the seller This warranty does not cover incidental or consequential damages and does not cover the cost of removing or reinstalling the units Cosmetic damage due to accident or normal wear and tear is not covered under warranty warranty is void if the products serial number has been removed or defaced Any applicable implied warranties are limited in duration to the period of the express warranty as provided herein beginning with the date of the original purchase at retail and no warranties whether express or implied shall apply to this product thereafter Some states do not allow limitations on implied warranties therefore these exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state if you need service on your Jl audio product All warranty returns should be sent to JL AUDIO s Amplifier Service Facility freightprepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase a copy of the original sales receipt Direct returns from consumers or nonauthorized dealers will be refused unless specifically authorized by JL AUDIO with a valid return authorization number Warranty expiration on products returned without proof of purchase will be determined from the manufacturing date code Coverage may be invalidated as this date is previous to purchase date Non defective items received will be returned freightcollect Customer is responsible for shipping charges and insurance in sending the product to JL AUDIO Freight damage on returns is not covered under warranty For service information in the usa please call Jl audio Customer service 954 4431100 900 AM 530 PM Eastern Time Zone Jl audio inc 10369 North Commerce Pkwy Miramar FL 33025 do not send product for repair to this address international warranties Products purchased outside the United States of America are covered only by that countrys distributor and not by JL Audio Inc SingleCycle Control US Patent 6084450 is used under exclusive license for mobile audio from Power Physics Inc Newport Beach CA MHD9005MANCH050509