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RtiControl RTI-AMP-4-125 - 4 Channel 125W 8Ω, 2 Channel 70/100V 250W DSP Matrix Amplifier

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Manual

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Installation and Operation Guide
RTI Commercial Ampliers
AMP-4-125 4Channel125W8Ω,
2Channel70/100V250WDSPMatrixAmplier
AMP-8-125 8Channel125W8Ω,
4Channel70/100V250WDSPMatrixAmplier
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Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Do not submerge the equipment in water or liquids.
7. Donotuseanyaerosolspray,cleaner,disinfectantor
fumiganton,nearorintotheequipment.
8. Clean only with a dry cloth.
9. Do not block any ventilation opening. Install in
accordancewiththemanufacturer’sinstructions.
10. Donotinstallnearanyheatsourcessuchasradiators,
heatregisters,stoves,orotherapparatus(including
ampliers)thatproduceheat.
11. Toreducetheriskofelectricalshock,thepowercord
shall be connected to a mains socket outlet with a
protective earthing connection.
12. Donotdefeatthesafetypurposeofthepolarizedor
groundingtypeplug.Apolarizedplughastwoblades
with one wider than the other. A grounding type plug
has two blades and a third grounding prong. The wide
bladeorthethirdprongareprovidedforyoursafety.If
theprovidedplugdoesnottintoyouroutlet,consult
anelectricianforreplacementoftheobsoleteoutlet.
13. Protectthepowercordfrombeingwalkedonor
pinchedparticularlyatplugs,conveniencereceptacles,
andthepointwheretheyexitfromtheapparatus.
14. Donotunplugtheunitbypullingonthecord,usethe
plug.
15. Onlyuseattachments/accessoriesspeciedbythe
manufacturer.
16. Unplug this apparatus during lightning storms or when
unusedforlongperiodsoftime.
17. Referallservicingtoqualiedservicepersonnel.
Servicing is required when the apparatus has been
damagedinanyway,suchaspowersupplycordor
plugisdamaged,liquidhasbeenspilledorobjects
havefallenintotheapparatus,theapparatushas
beenexposedtorainormoisture,doesnotoperate
normally,orhasbeendropped.
18. Theappliancecoupler,ortheACMainsplug,isthe
AC mains disconnect device and shall remain readily
accessibleafterinstallation.
19. Adheretoallapplicable,localcodes.
20. Consultalicensed,professionalengineerwhen
any doubt or questions arise regarding a physical
equipment installation.
Environmental Statement
This product complies with international
directives,includingbutnotlimitedtothe
RestrictionofHazardousSubstances(RoHS)
inelectricalandelectronicequipment,the
Registration,Evaluation,Authorizationandrestrictionof
Chemicals(REACH)andthedisposalofWasteElectrical
andElectronicEquipment(WEEE).Consultyourlocal
wastedisposalauthorityforguidanceonhowproperlyto
recycleordisposeofthisproduct.
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Introduction and Overview
1. Introduction
The AMP-4-125 and AMP-8-125 powerampliers
havebeendesignedtoprovidecongurable,
consistentandreliablehighperformanceaudio
poweramplicationforresidential,commercial
and entertainment applications. Please read this
manualfullybeforeinstallingandusingtheamplier.
Ifyouhaveanyquestionsregardingamplier
conguration,installationoroperationplease
contact the appropriate customer support portal.
Followingthisintroduction,themanualisdivided
intosectionscoveringthefollowingtopics:
2. Overview
3. Carton Contents
4. Installation
5.Conguration
6. Connections
7. Operation
8.Specications
2. Amplier Overview
TheAMP-4-125andAMP-8-125arehalfrackandfull
rackwidthrespectively,1Uformatpowerampliersthat
candrivebothconventionallowimpedance(Lo-Z,4Ωto
16Ω)loudspeakersandhighimpedance(Hi-Z,70V/100V)
transformercoupledloudspeakers.
Theampliersprovidefouroreightanaloginputsdepending
onmodeltype,onestereoS/PDIFdigitalinput,andeither
fouroreightoutputs(Lo-Zmode),ortwoorfouroutputs
(Hi-Zmode).
TheAMP-4-125andAMP-8-125ampliersalsoincorporate
automatic power sharing technology that enables power
tobesharedproportionatelyasrequiredbetweenpairsof
outputsinLo-Zmode.
TheAMP-4-125andAMP-8-125ampliermodelrackwidths,
outputchannelcountsandpoweroutputsareasfollows:
AMP-4-125(halfrackwidth)
Mode Channels Max Rated Output per Channel
Lo-Z Four 125Watts
Hi-Z Two 250Watts
AMP-8-125(fullrackwidth)
Mode Channels Max Rated Output per Channel
Lo-Z Eight 125Watts
Hi-Z Four 250Watts
TableofContents
Topic Page
Introduction and Overview .......................................................................................................... 3
Installation ..................................................................................................................................... 7
Power,Network,andWi-Fi.......................................................................................................... 10
CongurationMenus:DashboardandInput............................................................................ 11
CongurationMenus:EQandZones......................................................................................... 12
CongurationMenus:Output..................................................................................................... 14
CongurationMenus:SpeakerPresets..................................................................................... 15
CongurationMenus:Settings................................................................................................... 16
Signal Flow Schematic .................................................................................................................. 18
InputSetup,Routing,GPIOConnection.................................................................................... 19
Connections ................................................................................................................................... 21
Operation ....................................................................................................................................... 25
Specications................................................................................................................................. 26
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Introduction and Overview
2.1 Connections
AMP-4-125 and AMP-8-125 signal input and output
connections are accomplished via RCA Phono and
Euroblockstyleconnectors.AGPIO(GeneralPurpose
In/Out)Euroblockconnectorenablessomeamplier
functionstobecontrolled,andwirelessorRJ45socket
Ethernetnetworkconnectionoptionsarealsoprovided.
The AMP-4-125 and AMP-8-125 have no mains power
switch and are operational as soon as mains power is
connectedviatheIEC60320mainssocket.
2.2 Network Features
TheAMP-4-125andAMP-8-125ampliersareTCP/IP
network connected devices that require a wired or wireless
networkconnectiontoaccesstheircongurationmenus.
Thecongurationmenusareaccessedviathecontrolweb
appinterfaceandcoverInput,Zone,OutputandGeneral
Settingsfunctions.Thecongurationmenusarefully
describedinSection6ofthismanual.
2.3 Dimensions
AMP-4-125andAMP-8-125dimensionsandfeatures
areillustratedinDiagrams2Aand2B.Theampliers
areprimarilyintendedforinstallationinanequipment
rack but in some cases can also be under-desk or wall
mounted,orusedfreestanding.Theyarefan-cooledand
must be installed such that ventilation apertures are not
obstructed.
2.4 Firmware
Thismanualdescribesthefeatures,functionsanduser
interfaceoftheAMP-4-125andAMP-8-125running
Firmware Version 1.7.2.
Westronglyrecommendedthatthermware
versioninstalledintheamplierinuseischecked
initially,andregularlythereafter.Ifupdated
rmwareisavailable,theamplifiershouldbe
updated as a priority.
Thermwareinstalledintheamplifiercanbeidentifiedand
updated by selecting the Device option in the Control web
appSettingsMenu.Firmwareversionscanbechecked,and
rmwaredownloaded,fromtheAMP-4-125andAMP-8-125
website:http://www.rticontrol.com.Firmwareconbefound
athttps://www.rticontrol.com/dealer/rmware(Dealerlogin
isrequired).
3. Carton Contents
TheAMP-4-125andAMP-8-125ampliersareshippedin
acardboardcartoncontainingtheamplierunit,amains
cableappropriateforthesalesterritory,anaccessorypack,
andadocumentpack.Thefullcontentsislistedbelow.
•Amplierunit
• Mains power cable
• Input connector x 2 or 4
•GPIOsocketconnectorx1
•Outputconnectorx1,2or4
•Adhesiverubberfeetx4
•Setofrackears
• Document pack
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Diagram 2A
AMP-4-125 dimensions.
(Shadedareadenesventilationspace.)
44 mm
1.7 in
220 mm
8.7 in
213 mm
8.4 in
80 mm
3.1 in
25 mm
1.0 in
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80 mm
25 mm
Diagram 2B
AMP-8-125 dimensions.
(Shadedareadenesventilationspace.)
44 mm
319 mm
438 mm
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Installation
4. AMP-4-125 Half Rack Width Amplier
Installation
4.1 AMP-4-125 Mounting
AMP-4-125 halfrackwidthampliersareshippedwithout
rackmounthardwareattachedbutcanbeconguredfor
rackinstallationusingonestandardrack‘ear’andone
half-rackextensionpieceasillustratedinDiagram4A.The
installationandequipmentrackshouldbeconguredto
provideappropriateventilationairowspacearoundthe
sidesandrearoftheamplier.Ventilationairflowspaceof
atleast25mm(1in)shouldbemaintainedalongatleast
onesideoftheamplieratalltimes.Ventilationapertures
arealsolocatedontherearpaneloftheamplierand
must not be obstructed. It is important to retain at least
80mm(3.1in)freespaceforairowbehindtheamplifier
rear panel.
Multiple AMP-4-125 halfrackwidthamplierscanalsobe
mechanically connected using an accessory connecting
plate.Diagram4Billustratestheuseofaconnectingplate.
A connection plate is included in the kit shown in Diagram
4B. Together with 2 x rack ears a connection plate enables
apairofamplierstobejoinedandinstalledinafull
width rack space.
Diagram 4A
AMP-4-125
RackEar+Half-rackExtension.
RackEar+
2 x M4 x 8
countersunk
Half-rackExtension+
2 x M4 x 8 countersunk
ConnectionPlate+
4 x M3 x 6 countersunk
Diagram 4B
2 x AMP-4-125 with Connection Plate.
2 positions
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Installation
Diagram 4C
AMP-4-125
withdesk/wallMountingPlateandadhesivefeet.
2 positions and 4 positions.
Diagram 4D
AMP-4-125
wall and under-desk mount.
Note: Full rack width ampliers are not suitable for
under-desk or wall mount installation.
MountingPlate+
2 x M3 x 6 countersunk
Adhesive Foot
4 positions
4.2 Free-standing
Ifnotinstalledinanequipmentrack,theAMP-4-125amplier
canbeplacedfree-standingonaatsurface.Adhesiverubber
feetaresuppliedforthispurpose.
TheAMP-4-125ampliercanalsobeattachedtothe
undersideofdesksorwallmountedusingconnecting
platehardware.Theadhesiverubberfeetshould
also be used in these circumstances to minimise
thepossibilityofvibrationbetweentheamplier
andmountingsurface.Wallanddeskmountingis
illustrated in Diagrams 4C and 4D.
Itisimportantinanyfreestandinginstallationthat
airowthroughtheamplifier’ssidepanelmounted
fansandrearpanelventilationaperturesisnot
compromisedbyadjacentitems.Atleast80mmof
freespacebehindtheamplierand25mmalongat
least one side should be retained at all times.
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Installation
5. AMP-8-125 Full Rack Width Amplier
Installation
Note:FullrackwidthAMP-8-125isintendedforrackmount
orfree-standinginstallationonly.
5.1 Rack Mounting
TheAMP-8-125fullrackwidthamplierissuppliedwith
rackearstted.Theinstallationandequipmentrack
shouldbeconguredtoprovideappropriateventilation
airowspacearoundthesidesandrearoftheamplifier.
Ventilationairowspaceofatleast25mm(1in)shouldbe
maintainedalongatleastonesideoftheamplieratall
times. Ventilation apertures are also located on the rear
paneloftheamplierandmustnotbeobstructed.Itis
importanttoretainatleast80mm(3.1in)freespacefor
airowbehindtheamplifierrearpanel.
Diagram 5A
AMP-8-125
Adhesivefeet
5.2 Free-standing
Ifnotinstalledinanequipmentrack,theAMP-8-125fullrack
widthampliercanbeplacedfree-standingonaflatsurface.
Adhesiverubberfeetaresuppliedforthispurpose.Diagram
5Aillustratestheadhesivefootlocations.
Adhesive Foot
4 positions
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Conguration
6. Conguration
Beforemakinginput,outputandGPIOconnections,aninitial
AMP-4-125orAMP-8-125amplierconfigurationshouldbe
established.Itisparticularlyimportantthattheamplier
outputformatisconguredappropriatelyforthespeakers
that are to be connected.
CongurationrequiresthatAMP-4-125andAMP-8-125
ampliersareconnectedtomainspowerandnetwork
services.Theseconnectionsaredescribedinthefollowing
two sections.
6.1 Mains Power Connection
AMP-4-125andAMP-8-125ampliersincorporateapower
factorcorrectedpowersupplyandcanbeusedwithmains
inputvoltagefrom100VACto240VAC,50/60Hz.Usethe
mainscablesuppliedwiththeamplierandconnectittoa
switched mains supply.
AMP-4-125andAMP-8-125ampliershavenomainspower
switch and are operational as soon as mains power is
connected.
6.2 Network Services
AMP-4-125andAMP-8-125ampliersareconfiguredviaa
webpage.Beforethecongurationmenuscanbeaccessed,
theamplier(s)mustbeconnectedtothesameTCP/IP
network as the computer or mobile device that is to be used
forcongurationaccess.
6.2.1Wired(Ethernet)NetworkConnection
ToconnecttheampliertoaTCP/IPnetworkusingawired
connection(Ethernet)followthestepsbelow.
1.UseanEthernetcabletoconnecttheamplierrrearpanel
NetworkControlsocket(uppersocket)toafreesocketona
network router or switch.
2.Connecttheampliertomainspowerusingthesupplied
mainscable.WaitforthefrontpanelNetworkindicatorto
illuminategreentoindicatethattheamplierhasnetwork
connectivity.
3.TheAMP-4-125andAMP-8-125ampliersaresettoDHCP
bydefault.Thenetworkrouterwillautomaticallyassignthe
amplieranIPaddress.Anetworkscanningapplicationcan
beusedifrequiredtoidentifytheamplier’sIPaddress.
4.Openawebbrowserpageandentertheamplier’sIP
address.Theamplier’sControlWebAppinterfacewillopen
toenableamplierconfigurationasrequired.
Note: If the amplier is power cycled while using DHCP, it is
possible that the network router will assign it a dierent IP address,
leaving its conguration page inaccessible via the previous address.
If this occurs, a network scanning app can be used to identify the
new IP address. DHCP and Fixed IP address option settings can be
found in the Settings Tab menu described in Section 6.3. It’s recom-
mended to use a MAC reservation in the network router.
6.2.2 Wireless (WiFi) Network Connection
ToconnectaAMP-4-125orAMP-8-125ampliertoaTCP/IP
networkusingawirelessconnection(WiFi)followthesteps
below.
1.Withtheamplierconnectedtomainspower,waitforthe
frontpanelWiFiindicatortoilluminategreen.
2.Useamobile,laptopordesktopdevicetosearchforavailable
WiFi networks. Connect to the AMP-4-125 or AMP-8-125
(productserialnumber)’usingthepassword,‘password’.The
amplierserialnumbercanbefoundonitsrearpanel.
3. Open a computer or mobile device web browser and enter
theIPaddress:192.168.4.1.TheControlWebAppinterfacewill
opentoenableamplierconfigurationasrequired.
4.SelecttheWebAppSettingsTabfollowedbyWiFi>WiFiMode
>Clienttoconguretheamplifiertoconnecttotherequired
WiFI network. The WiFi network name and password will be
required.
It is strongly recommended that the amplier Access
Point WiFi password is changed following initial wireless
connection.
6.3 Conguration Menus
Opening a web browser that is network connected to the
amplierinitiallydisplaystheControlWebAppDashboard
illustratedinDiagram6A.TheDashboardisthe‘home’page
fromwhichallothercongurationoptionscanbeaccessed.
TheDashboarddisplaystheamplierstatus,outputzonesand
thecongurationmenutabs.Italsoenablesimmediateaccess
tozonevolumecontrolThefunctionsavailableundereach
congurationmenutabaredescribedinthefollowingsections.
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Conguration
6.3.1 Input Tab
TheInputTab(Diagram6B)providesthe
followingcongurationparametersfor
eachamplierinputchannel:
• Input name
• Mono/Stereo selection
• Input sensitivity
• High-passlter
• Gaintrim
• Fivebandequalization
The Input Tab also enables input signals
tobemixedandroutedtospecic
amplierzones.Themixfunctionenables
anyamplierinput,includingstereoor
splitmonoS/PDIFinputs,tobegrouped
with any other input or inputs to create
multiplepredenedmixes.
Note: When adjusting the input gain, the
input level display should remain green. If it displays red, reduce the
input gain.
Diagram 6A
CongurationDashboarddisplay
Diagram 6B
Input Tab display
(onlytwoinputsshown)
Adjustzonevolume
Adjustzonevolume
Select input type
Input name - type to edit
Select mono or stereo
Select input sensitivity option
Adjustinputgain
OpenEQwindow
High-passlter
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6.3.2 Zone Tab
TheZoneTabenablesinstallationzonestobedenedand
named,andprovidesaccesstofurthersub-menus.Zones
mightbebarorrestaurantareasforexample,ordierent
roomsinahome.ForallZoneTabmenus,theinstallation
zoneundercongurationisselectedbyhighlightingoneof
thezoneidentiers(AtoHdependingonamplifieroutput
count)atthetopofthedisplay.Diagram6Eand6Fillustrate
theZoneTabandZoneSourcemenudisplays.
• TheSourcemenuenablesinputstobeassignedtozones
andInputPriorityorInputDuckingtobecongured.The
InputPriorityfunctionenablesanalternativeinputto
replaceandmutetheinputprimarilyroutedtothezone
undercongurationwhenthealternativeinputexceedsa
preset level.
Diagram 6C
InputEQdisplay
Note: The number of individual mixes possible is equal to the
number of amplier analog outputs (two outputs enables two
mixes, four outputs enables four mixes, eight outputs enables
eight mixes). Note: Mix inputs are muted by default with their
level adjustment sliders set to zero. Mix operations take place
following high-pass lter, input equalization and mono/stereo
selection.
Apinknoiseorsinewaveaudiosignalgenerator,
appropriateforaudiosystemtestingandsetup,canalso
beenabled,disabled,andadjustedforgainandfrequency
viatheInputTab.Diagrams6B,6C,and6Dillustratethe
InputTab,InputEQandInputMixdisplaysrespectively.
Conguration
Diagram 6D
Input Mix display
SelectEDITtoapplyrequiredEQ
Slectmicfunction
Mix name - type to edit
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Selectzone
Diagram 6E
ZoneTabdisplay
Conguration
The Input Ducking functionenablesanalternativeinput
to replace and attenuate the input primarily routed to
thezoneundercongurationwhenthealternativeinput
exceeds a preset level.
Note: Input Priority and Input Ducking parameters can be
either set to default values or their Threshold, Attack, Hold
and Release values set as required. Input Priority can also be
set to ignore the volume level set for the specied zone and
take a specic override volume.
• The Volume menu allows minimum and maximum
zonevolumelimitstobeset,andenablesexternal
GPIOvolumecontroltobeappliedtoindividualzones.
TheGPIOcongurationmenucanbefoundunder
theSettingsTab,andnotesonconnectinganexternal
volumecontrolviatheGPIOinterfacecanbefoundin
Section6.5ofthismanual.
Diagram 6F
ZoneSource menu display
Note: If an amplier is controlled via a third-party control system
API, volume level limits set via the Input Tab will not apply.
• TheRestrictionsmenuenableszoneinputsorinputmixes
toberestrictedfromroutingtoparticularzones.
Note: Routing restrictions cannot be applied to priority zone
inputs.
Note: If an amplier is controlled via a third-party control system
API, input routing restrictions set via the Input Tab will not
apply.
• TheCompressoroptionenablesdefaultorcustomsignal
compressiontobeappliedtoindividualzones.
Note: Compression can be useful to reduce the volume
dierence between loud and quiet audio material. The lower the
compression threshold is set, the more the dierence between
loud and soft will be reduced. The overall zone volume may
need to be increased when compression is used. The default
compression parameters are appropriate for most installations.
Selectzone
Select input Select priority
Zonename-typetoedit
Select mono or stereo
Selectzoneinput
Adjustzonevolume
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Conguration
Diagram 6H
Speaker Preset Parameters
Diagram 6G
Output Tab display
6.3.3 Output Tab
TheOutputTab(Diagram6G)enablesamplieroutputsto
benamed,linkedtozones,andprovidesaccesstoDelay,
RoomEqualizerandSpeakerPresetmenus.Diagram6H
illustrates the Output Tab display.
ForallOutputTabmenus,theamplieroutputunder
congurationisselectedbyhighlightingoneoftheoutput
identiersatthetopofthedisplay.
Note:Thenumberofindividualoutputsavailablefor
congurationwilldependontheinput,zone,andoutput
modeconguration.Thediagramsfollowingillistrateafour
outputamplier.
• TheRoutingmenuenableszonestobeassignedto
amplieroutputs.
Note:Routingforzonesspeciedasstereowill
automaticallyoerthreeoutputoptions:leftchannel,
right channel or summed mono. The summed mono signal
canpotentiallybeusedtodriveamonosubwooferora
70/100V mono speaker line.
• The Delay menu enables delay to be applied to
individualamplieroutputs.
• TheEqualizermenuenablesparametricequalizationtobe
appliedtoindividualamplieroutputs.Equalizersettings
conguredforoneamplifieroutputcanbecopiedand
applied to other outputs.
• TheSpeakerPresetmenuenablesasetofspeaker
parameterstobeadjusted,andpresetcongurationsto
becreated,exported,imported,orcleared.
Speaker Presets can be simply applied to the selected
amplieroutputorimported,chosenfromalibrary,
exportedorcleared.Thepresetcongurationscaninclude
anyoralloftheparametersdescribedinSection6.3.4and
canbelockedtopreventinadvertentmodication.Diagrams
6I,6J,and6Killustratetheapplicationofspeaker
presets.
SpeakerPresetdataprovidedbythirdpartiesforusewith
specicspeakerscanbeimportedandappliedtoamplifier
outputs.Toimportspeakerpresetparametersfollowthe
steps described below and illustrated in the diagrams.
1.SelecteithertheIMPORTPRESETFROMLIBRARYor
SELECTPRESETFROMFILEoptionfromtheSpeaker
Presetmenu.Ifnoimportoptionisvisible,select
CLEARtodeleteanyexistingspeakerpresetdata.
Output name - type to edit
Select output
Deneoutputrouting
Adjustgainifrequired
Select output
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Note: The SELECT PRESET FROM LIBRARY option will be
unavailable if no speaker preset libraries have been created.
Speaker preset library creation and management is described in
Section 6.3.5.
2.Selecttheappropriate‘.zcp’formatspeakerpreset
dataletoimportfromeitheraLibraryoracomputer
folder.Thepresetdatawillbeappliedtotheselected
amplieroutputassoonasthefileimportiscomplete.
3.
IftheSpeakerPresetdatarequiresmodicationitcanbe
customizedbyselectingtheCUSTOMIZEPRESEToption.
Diagram 6I
SpeakerPresetimportleselection
Conguration
Diagram 6J
Speaker Preset applied
Note: If an imported Speaker Preset data le includes locked
parameters, they will be unavailable for modication.
6.3.4 Speaker Preset Menu Parameters
• The Crossover & Gain preset menu enables high or
low-passcrossoverltersandgainadjustmenttobe
appliedtoindividualamplieroutputs.
• The Speaker EQ preset menu enables parametric
equalizationtobeappliedtoindividualamplier
outputs.
• The FIR presetmenuenablesFIR(FiniteImpulse
Response)basedequalizationltercoefficients
generatedbyexternalspeakermeasurementsoftware
tobeimportedandappliedtoindividualamplier
outputs.TheFIRlterhas512tapsat48kHz.
Note: FIR coecient les in either .csv or .txt format can be
imported.
Diagram 6K
SpeakerPresetparameteradjustment
EngageEQbands
Selectbandfunction
Adjustgain
Adjustfrequency
AdjustQ
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Conguration
Diagram 6L
Settings Tab menu
• The Driver Alignment preset menu enables delay to be
appliedtoindividualamplieroutputs.
• The Polarity presetmenuenablesthepolarityof
individualamplieroutputstobereversed.
• The Limiter preset menu enables signal limiting
tobeengagedorbypassedonindividualamplier
outputs.Cliplimiting,PeaklimitingandRMSlimiting
can be individually or collectively engaged. The Clip
limitingfunctionoersFastandNormalresponse
timeoptions.ThePeaklimitingfunctioncanbesetto
either Automatic or Manual parameter values. The
RMSLimiterhasdefaultparametervaluesthatcanbe
adjustedbuthasnoautomaticoption.
Note: In automatic mode, the peak limiter parameters adjust
automatically in response to Crossover & Gain high-pass lter
settings.
• The Output Mode preset menu enables individual
amplieroutputstobeswitchedofforconfiguredfor
Lo-ZorHi-Zmodes.InHi-Zmodes,ahigh-passlter
canalsobeconguredandappliedtotheoutput.
Thenumberofoutputsavailablewilldependonthe
ampliermodel,inputsetupandzonesetup.For
example,atwooutputamplierwillhavetwooutputs
availableifLo-Zmodeisselectedbutonlyoneoutput
availableifHi-Zmodeisselected.
Note: Use of a high-pass lter with Hi-Z mode loudspeakers
is useful to avoid the possibility of distortion caused by low
frequency line transformer saturation. Begin with the default
lter setting of 70Hz. If low frequency distortion is still audible,
increase the frequency setting one step at a time until the
distortion is no longer audible.
6.3.5 Settings Tab
TheSettingsTabenablesmiscellaneousampliersettings
tobeconguredandinstallationdatatoberecorded.
TheSettingsTabprovidesaccesstofurthersub-menus.
Diagram6LillustratestheSettings Tab.
• The System Informationmenuprovidestexteldsfor
therecordingofinstallationdata.TheDevice menu
recordsamplierspecificinformationsuchasthe
modelnumberandrmwareversion.
Armwareupdateroutineandidentifierbuttoncan
alsobefoundundertheDevicemenu.
• The Devicemenurecordsamplierspecificinformation
suchasthemodelnumberandrmwareversion.A
rmwareupdateroutineandidentifierbuttoncanalso
befoundundertheDevicemenu.
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AUDIO DISTRIBUTION
Conguration
Diagram 6M
SpeakerLibraryCreationandManagement
• The Backup & Restore menuenablesamplier
congurationdatatobedownloadedtoanexternalarchive,
andenablespreviouslysavedcongurationfilestobe
uploadedandadoptedbythecurrentlyconnectedamplier.
• The Speaker Librarymenuenablesmanagementof
speakerpresetlibraries.Existinglibrariesofspeakerpreset
les(.zcl)canbecreatedorimported,andexistinglibraries
editedorfullydeleted.Diagram6Millustratesthecreation
andmanagementofspeakerpresetlibraries.
• The Security menu enables a password to be set in order
toprotectagainstunauthorisedaccesstotheamplier
Control Web App. Password protection is particularly
importantwhenanamplierisconnectedtoawired
network as the a WiFi password is no longer required to
gain access to Control Web App.
Note: It is recommended that a Control Web App password is
dierent from that required to gain access to the amplier via WiFi.
• The Power Management menu enables various automatic
switch-on options to be engaged. The Power Management
menualsooerstimedStandbyandMutefunctions.
Note: In Eco mode the network is switched o during standby.
• The Output Routingmenuenablesspeciedinputsor
zonestoberoutedtotheamplierS/PDIFoutputs.The
outputlevelcanalsobeadjusted.
Anyzoneorinputcanberoutedtoeitherdigitaloutput,
includinginputsnotactivelyassignedtoazone.Primary
orpriorityinputstatusisimmaterial.Thespeciedinputis
alwaysroutedtothespeciedoutputtobeavailableforuse
by downstream devices.
Note: When a zone is selected for the digital S/PDIF output - the
output signal is variable.
Note: The digital output function is especially useful when
ampliers are to be daisy chained and a specic input; a central
paging mic, for example, is required to be routed to multiple
ampliers.
• The GPIOmenuenablescongurationofthemulti-purpose
GPIOinterfacepins.Adescriptionoftheindividualsettings
is detailed in AMP-4-125 and AMP-8-125 Control.
• The LANmenuenablescongurationandresetofthewired
network options and parameters.
• The WiFimenuenablescongurationandresetofthe
wireless network options and parameters.
6.4 Setup and Signal Routing
Thankstotheirnetworkbasedcongurationfeatures,the
AMP-4-125andAMP-8-125ampliersofferconsiderable
versatilityintermsofsources,signalrouting,installation
zonesandoutputmodes.Inputscanbefreelyassignedto
installationzones,andthosezonesassignedfreelytothe
availableamplieroutputsineitherLo-ZorHi-Zmodes.
Thisversatilityenables,forexample,oneamplier
simultaneouslytodrivebothLo-ZandHi-Zspeakers,orfor
dierentinputstoberoutedtodifferentoutputzones.
Thefollowingparagraphsdescribeandillustratethe
recommendedprocedureforconguringinput,zoneand
outputrouting.Ageneralsignalowschematicisalso
illustratedinDiagram6N.
Importpresetdata(.zcp)tolibrary
Creat new library
Rename library
Delete library
Libraryname-typetoedit
Libraryversion-typetoedit
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AUDIO DISTRIBUTION
Conguration
Analog 3
Output
Matrix
Zones A - D
Outputs 1 - 8
Analog 2
Input
Sensitivity
Analog 1
Input
Gain
Input
Sensitivity
Input
Gain
Input
Sensitivity
Input
Gain
Analog 4
SPDIF (stereo)
SPDIF Out (any two input or zone signals).
Pink Noise
Gain
Delay
Level
Adjustment
Level
Adjustment
Level
Adjustment
Level
Adjustment
Compressor
Compressor
Compressor
Compressor
Level
Adjustment
Level
Adjustment
Level
Adjustment
Level
Adjustment
Compressor
Compressor
Compressor
Compressor
Delay
Delay
Delay
EQ
EQ
EQ
EQ
EQ
EQ
EQ
EQ
FIR
FIR
FIR
FIR
Polarity
Polarity
Polarity
Polarity
Limiter
BTL
Amplifier
2 x Low-Z
1 x Hi-Z
BTL
Amplifier
2 x Low-Z
1 x Hi-Z
Limiter
Limiter
Limiter
Driver
Alignment
Driver
Alignment
Driver
Alignment
Driver
Alignment
Crossover
Crossover
Crossover
Crossover
Gain Trim
Gain Trim
Gain Trim
Gain Trim
Input
Sensitivity
Input
Gain
Analog 7
Analog 6
Input
Sensitivity
Analog 5
Input
Gain
Input
Sensitivity
Input
Gain
Input
Sensitivity
Input
Gain
Analog 8
Input
Sensitivity
Input
Gain
Input
Selection
Input Setup
Zone Setup & Routing
Output Setup
Output 1
Output 2
Output 3
Output 4
Delay
Delay
Delay
Delay
EQ
EQ
EQ
EQ
EQ
EQ
EQ
EQ
FIR
FIR
FIR
FIR
Polarity
Polarity
Polarity
Polarity
Limiter
BTL
Amplifier
2 x Low-Z
1 x Hi-Z
BTL
Amplifier
2 x Low-Z
1 x Hi-Z
Limiter
Limiter
Limiter
Driver
Alignment
Driver
Alignment
Driver
Alignment
Driver
Alignment
Crossover
Crossover
Crossover
Crossover
Gain Trim
Gain Trim
Gain Trim
Gain Trim
Output 5
Output 6
Output 7
Output 8
Zone Adjustment Parameters
Speaker Preset Parameters
Input
Gain
Input
Gain
Input
Gain
Input
Gain
Diagram 6N
Signal Flow Schematic
(eightoutputamplier)
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AUDIO DISTRIBUTION
Conguration
6.4.1 Input Setup
OpenthecongurationDashboardandselecttheInput
Tab. The Input Tab is shown in Diagram 6B.
• Toeditdefaultinputnamessimplyselectandtypein
theInputNameeld.
• Deneamonoorstereoinputbyselectingthe
appropriateoption.Deningastereoinputwillreduce
thetotalnumberofdiscreteinputsavailable.
• Selectaninputsensitivityoptionfromthedrop-down
menu:+14dB,+4dB,-10dBand‘microphone’options
areavailable.Generally,the+14dBor+4dBoptionsare
appropriatefor‘professionalaudio’sourcehardware
withbalancedoutputs,whilethe-10dBoptionismore
appropriatefor‘consumeraudio’sourcehardware
withunbalancedoutputs.The‘microphone’option
providesthesignicantlygreatersensitivityrequiredfor
microphones.
Note: Only dynamic microphones are suitable for connection.
Phantom power for condenser microphones is not provided.
• Ifnecessary,adjusttheinputgainusingtheslideror
up/downicons.Gainadjustmentisintendedtobe
usedforneoutputleveladjustmentfollowinginitial
use.Ifnecessary,adjusttheinputEQusingthe5band
equalizer.
6.4.2 Zone Setup & Routing
OpenthecongurationDashboardandselecttheZone
Tab.TheZoneTabisshowninDiagram6E.
• Selectthezonetobecongured.Thenumberofzones
availableandtheirchannelformat(stereoormono)will
dependontheampliermodel,inputsetupandoutput
mode(Lo-ZorHi-Z).
• TheAMP-4-125canhavethefollowingzones
congured:
•2xstereoLo-Zzones
•4xmonoLo-Zzones
•2xmonoHi-Z
•1xmonoHi-Z+1xstereoLo-Zzone
•1xmonoHi-Z+2xmonoLo-Zzones
• TheAMP-8-125canhavethefollowingzones
congured:
•4xstereoLo-Zzones
•8xmonoLo-Zzones
•4xmonoHi-Zorzones
•2xmonoHi-Zor+2xstereoLo-Zzone
•2xmonoHi-Zor+4xmonoLo-Zzones
Note:WhenconguredinHi-ZmodetheAMP-4-125and
AMP-8-125ampliersoperatein‘bridged’formatwhere
theoutputoftwochannelsiscombined.Thismeansthat
thenumberofoutputchannelsavailableinHi-Zmodeis
halfthatavailableinLo-Zmode.
Note: Mono signals might be mono at source, created though
combining the left and right channels of a stereo signal
(summed mono) or treating the left and right channels of a
stereo signal independently (split mono).
• NamezonesbytypingintheZoneNameeld.
• Adjustthezonevolumeifrequiredbyusingtheslider.
• Deneamonoorstereozonebyselectingthe
appropriateoption.Deningastereozonewillreduce
thetotalnumberoffurtherzonesavailable.
• Specifyaninputforthezonebyselectingfromthe
drop-downmenu.Selectingastereoinputforamono
zonewillautomaticallysumthestereochannelsto
mono.
6.5 GPIO Setup and Connection
TheAMP-4-1256andAMP-8-125provideaGPIOsocket
thatenablesremotecontrolofvolume,standby,muteand
triggerfunctions.TheGPIOconnectorpinfunctionsare
describedintheGPIOSettingsmenuillustratedinDiagram
6Q.TheconnectionofGPIObasedremotevolumecontrol
and standby/mute are illustrated in Diagram 6P and
Diagram6Qrespectively.
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AUDIO DISTRIBUTION
Conguration
6.5 GPIO Setup and Connection
TheAMP-4-125andAMP-8-125ampliersprovideaGPIOsocket
thatenablesremotecontrolofvolume,standby,muteandtrigger
functions.TheGPIOconnectorpinfunctionsaredescribedinthe
GPIOSettingsmenuillustratedinDiagram6O.Theconnection
ofGPIObasedremotevolumecontrolandstandby/muteare
illustratedinDiagram6PandDiagram6Qrespectively.
Note:TheGPIOconnectormustnotbeusedforany
unintendedpurpose.Amplierdamagemayresultfrom
incorrectuseofGPIO.
Note:Shieldedcablemustbeusedwhenconnecting
standbyswitchesandpotentiometersviaGPIO.
Note:GPIOPin8hasalowoutputimpedanceandis
abletosupplyamaximumcurrentof10mA.
Note:GPIOPin1andPin3bothoergroundconnections:
Pin1isconnecteddirectlytotheamplierchassis.Pin3
is connected to the chassis via a 220 Ohm resistor. The
‘softground’connectionofPin3ispotentiallyusefulfor
managing ground loops that may cause audible hum.
Diagram 6O
GPIOSettingsMenu
Diagram 6P
Potentiometerconnectionsforremotevolume
controlviaGPIO.
Note: Diagram 7E illustrates
use of the GPIO connector.
Diagram 6Q
Connectionsforremotestandby/muteswitchviaGPIO.
Note: Diagram 7E illustrates use of the GPIO connector.
Connect Wiper to
Pin4,5,6,or7.
Switchopen(NO)orclosed
(NC)togglesStandby
or Mute depending on
options selected in the
GPIOSettingsMenu
Potentiometer
(>10kΩ)
Ground
+3V3
Ground
Standby/Mute
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AUDIO DISTRIBUTION
Connections
7. Connections
AMP-4-125 and AMP-8-125 rear panel connections
are illustrated in Diagrams 7A and 7B.
7.1 Mains Power Connection
Theseampliersincorporateapowerfactorcorrected
universal power supply and can be used with mains input
voltagefrom100VACto240VAC,50/60Hz.Usethemains
cablesuppliedwiththeamplier.
Theampliershavenomainspowerswitchandare
operationalassoonasmainspowerisconnected.Ensure
thatallsignal,GPIOandoutputconnectionsaremade
beforeconnectingtheampliertomainspower.
7.2 Input Connection
Bothampliermodelsprovidefourbalancedor
unbalanced analog audio inputs and a stereo S/PDIF digital
audio input. Any input channel can be routed to any output
channel.Inputroutingoptionscanbeconguredviathe
ampliernetworkinterface.SeeSection6ofthismanual.
Analog Inputs
Analoginputsareoflinelevelformatwithadefaultinput
sensitivityof+4dBu(fulloutputvoltageswing/sensitivity)
inalloutputmodes.Inputsignallevelsupto+24dBucan
be handled without input clipping. Input sensitivity options
canbesetviatheampliernetworkinterface.SeeSection
6ofthismanual.
Diagram 7A
AMP-4-125 rear panel connections.
Note: Two output amplier model connection sockets dier
only in the deletion of channel 3 and channel 4 output.
Balancedinputconnectionstotheampliersaremade
viamale‘EuroBlock’connectors.Connectingcablestothe
suppliedfemaleinputconnectorsisillustratedinDiagram
7C.
Unbalancedinputconnectionstotheampliersaremade
via RCA phono sockets connected in parallel with the
balanced inputs.
Digital Outputs
Forbothampliers,S/PDIFstereodigitalaudiooutput
connections are made via a single RCA Phono socket. The
S/PDIFoutputsignalcanberoutedfromanyinputorzone
andisintendedtobeusedfordaisy-chainingmultiple
ampliers.
Note: See the Output Routing paragraphs of Section 6.3.3 for
more information on Digital Output conguration.
Note: 75Ω RCA Phono cables specically intended for digital
audio should always be used for S/PDIF connections. Standard
Phono cables can be used but may not result in optimal
performance.
Note: The S/PDIF output level is by default set at -10dB to
reduce the possibility of downstream input clipping.
Network Control Congurable
GPIO
Congurable
S/PDIF Audio I/O
Audio Inputs
Balanced: Euroblock
Unbalanced: RCA Phono
Congurable Speaker Outputs
Mains power input
THAILAND
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AUDIO DISTRIBUTION
7.3 Output Connections
Outputconnectionsfromtheampliersareachievedvia
male‘EuroBlock’connectors.Ensurethatspeakerconnection
polarityiscorrectthroughouttheinstallation:
InthecaseofLo-Zspeakerconnections,positive(+)amplier
terminals should always be connected to positive speaker
terminalsandnegative(–)amplierterminalsalways
connected to negative speaker terminals.
InthecaseofHi-Zspeakerconnections,thetwospeaker
cable conductors should be connected between the positive
(+)terminalofOutput1andthenegativeterminal(-)of
Output2,andlikewiseforandadditionalHi-Zoutputs.
Outputmodeoptions(Lo-ZorHi-Z)canbeconguredviathe
ampliernetworkinterface.SeeSection6ofthismanual.
Connectingcablestothesuppliedfemaleoutputconnectoris
illustrated in Diagram 7D.
Connections
Diagram 7B
Full rack width
AMP-8-125 rear
panel connections.
Network
Congurable GPIO
Congurable
S/PDIF Audio
Audio Inputs
Balanced: Euroblock
Congurable Speaker Outputs
Audio Inputs
Unbalanced: RCA Phono
Mains
power input
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AUDIO DISTRIBUTION
Connections
7.5 Speaker Cable Gauge
The speaker connection cable gauge should be chosen
appropriatelytoreectthetypeofinstallation.The
adjacenttablesspecifytheappropriatecablegauge
forlessthan0.5dBcablelosswithdierentinstallation
types and cable lengths.
7.5 GPIO Connections
IfanyGPIOfunctionalityisrequired,cableswillneed
tobeconnectedtothesuppliedGPIOconnector.
ConnectingcablestotheGPIOconnectorisillustrated
inDiagrams7E.
7.6 Network Connections
TheseampliersareTCP/IPnetworkconnecteddevices
thatareconguredviaawebpagebasedinterface.
Wired(Ethernet)andwireless(WiFi)connectionoptions
areavailable.ConnectingtheseamplierstoaTCP/
IPnetworkisdescribedinSection6ofthismanual.Ifa
wiredconnectionisused,connectanEthernetcableto
theamplierrearpanelNetworkControlsocket.
Cable Gauge Table
Lo-Zinstallations,0.5dBattenuation.4Ω&8Ωloads
Cable Gauge Table
70VHi-Zinstallations,1.0dBattenuation
20 speakers evenly distributed
Cable Gauge Table
100VHi-Zinstallations,1.0dBattenuation
20 speakers evenly distributed
Cable Cross
Section
(mm
2
)
CableGauge
(AWG)
Max Cable
Length
(Metres,4Ω
load)
Max Cable
Length
(Metres,8Ω
load)
0.75 ≈18 5 10
1.5 ≈16 10 20
2.5 ≈14 17 35
Cable Cross
Section
(mm
2
)
CableGauge
(AWG)
MaxCableLength
(Metres),
(125W/channel)
MaxCableLength
(Metres),
(250W/channel)
0.75 ≈18 90 45
1.5 ≈16 180 90
2.0 ≈14 <250 150
Cable Cross
Section
(mm
2
)
CableGauge
(AWG)
MaxCableLength
(Metres),
(125W/channel)
MaxCableLength
(Metres),
(250W/channel)
0.75 ≈18 190 90
1.5 ≈16 <250 180
2.0 ≈14 <250 <250
Note: Cable lengths should not exceed 250m.
Note: Cable lengths should not exceed 250m.
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24
AUDIO DISTRIBUTION
5 mm
5 mm
Low-Z Mode
Hi-Z Mode
5 mm
5 mm
Connections
Diagram 7C
Balanced analog input
cable connections.
Diagram 7D
Output cable connections.
Diagram 7E
GPIOcableconnections.
Theexclamationpointprintednexttotheoutputterminalsoftheampliersis,inadditiontotheCLASS2WIRING
text,intendedtoalertuserstotheriskofhazardousvoltages.Outputconnectorsthatcouldposeariskare
markedwiththeexclamationpoint.Donottouchtheoutputterminalswhiletheamplierisswitchedon.Make
allconnectionswiththeamplierswitchedoff.
Note:Input,outputandGPIOconnection
socketuseisthesameforfourandeight
channeloutputampliers.
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AUDIO DISTRIBUTION
Operation
8. Operation
Onceallconnectionshavebeenmadeandconguration
optionsselected,theAMP-4-125orAMP-8-125isreadyfor
use.Ifaninputsignalabove-60dBispresentonanyinput,
thefrontpanelInputandStandbyindicatorswillilluminate
greentoindicatenormalamplieroperation.Audiowillbe
heardfromanyconnectedspeakers.
Note: The ampliers will not switch on from Standby Mode
unless an input signal is present, a network ‘ON’ command
is received, or an external standby switch (or 12V trigger) is
operated. Standby behaviour can be congured via the Power
Management menu of the Settings Tab.
Amplieroutputswillmuteifnoinputsignalispresentfor
5minutes,andtheamplierwillswitchautomaticallyto
StandbyModeifnosignalispresentonanyinputformore
than 15 minutes. Alternative standby and mute delay times
canselectedviatheSettingsTab.Ampliercoolingfanspeed
istemperaturecontrolled.Thefanwillswitchowhenthe
amplierentersstandbymode.
8.1 Front Panel Indicators
AMP-4-125andAMP-8-125amplierfrontpanelindicators
illuminatetoindicatethefollowingoperationalstates:
Status: O–Mainspowerdisconnected.
Green–Amplieroperational.
PulseGreen–StandbyMode.
Amber–GPIOtriggeredStandbyMode
Input: O–Noinputsignalpresent.
Green–Signalpresentononeormoreinputs.
Amber–Signallimiting/clippingononeormore
inputs.
Output: O–Nooutputsignalpresent.
Green–Signalpresentononeormoreoutputs.
Amber–Signallimiting/clippingononeormore
outputs.
Red–Oneormorechannelpairisin
overload/protection mode.
Network:O–NoEthernetnetworkdetected.
Green–Ethernetnetworkdetected.
WiFi: O–WiFidisabled.
Green–WiFienabled.
8.2 Automatic Power Sharing
TheAMP-4-125andAMP-8-125ampliersincorporate
apowersharingfeaturethatautomaticallysharesthe
totalpoweravailablefromtheamplier’sinternalpower
supplyacrosseachpairofoutputchannels.Ifonechannel
temporarilydemandsmorethantheamplier’scontinuous
powerratingwhileotherchannelisdemandingless,the
excesspoweravailablefromtheinternalpowersupplyis
automatically made available to the over-power channel.
Powersharingoptimisestheamplier’sabilitytodeliver
maximum power into dynamic loudspeaker loads when
playing music programme material.
8.3 Default Reset
Bothamplierscanbereturnedtotheirdefaultsettingsvia
either the Control Web App Settings Tab or the hardware
reset pinhole button. The reset pinhole button is located on
theundersidepaneloftheamplier.
Toresettheamplierusingthepinholebutton,followthe
stepsbelow:
•Disconnecttheamplierfrommainspower.
• Use an appropriate tool to press and hold the reset
pinhole button while simultaneously reconnecting mains
power.
•Continuetoholdtheresetpinholebuttonfor3seconds
astheamplierrestarts.
Theamplierwillrestartwithallsettingsattheirdefaultstate.
Anypreviouslyconguredsettingswillbedeleted.
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AUDIO DISTRIBUTION
Specications
Model AMP-4-125 AMP-8-125
Total System Power 500 W 1000 W
OutputPower@4/8Ω 4 x 125 W 8 x 125 W
Output Power @ 70/100V* 2 x 250 W 4 x 250 W
Powershare(upto)
Across all channels**
2 x 250 W 4 x 250 W
Power Consumption 150W 300 W
Dimensions
44 x 220 x 319mm
(1.7x8.7x12.6in)
44 x 220 x 319mm
(1.7x17.3x12.6in)
Weight 2.8kg(6.2lbs) 3.8kg(8.4lbs)
Power Ratings 1% THD @ 120Vac and 230Vac
Output Circuitry UMAC™ClassD-fullbandwidthPWMmodulatorwithultra-lowdistortion
Output Voltage 70Vp/140Vpp(unloaded)//Bridged140Vp/280Vpp(unloaded)
SignalToNoise-Ratio >106dB(A-weighted,20Hz-20kHz,8Ωload)
THD+N(typical) <0.05%(20Hz-20kHz,8Ωload,3dBbelowratedpower)
Frequency Response 20Hz-20kHz(+0/-0.8dB(8Ωload,3dBbelowratedpower)
Protection Circuits Shortcircuit,DC,Undervoltage,Temperature,andOverloadprotection
Power Supply
UREC™universalmainsswitchmodepowersupplywithPowerFactorCorrection(PFC)andstandby
converter
Operating temperature 0-40°C
Operating Voltage/Frequency UniversalMains,100V-240V,50Hz-60Hz
Standby Consumption < 0.6W
Accessories
2x Rack ears
1x ½ rack plate extension
2x ½ rack mounting plates
2x Rear supports
2xRackears(tted)
2x Rear supports
*100Vlinemodeis@-1dB(≈90V)
** AMP-4-125 may only Powershare across Ch1-2 and Ch3-4
AMP-8-125mayonlyPowershareacrossCh1-2,Ch3-4,Ch5-6andCh7-8
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Rev 11/24
1/8th Full Power
Model
Load
(Ohms)
Power In
(W)
Power Out
(W)
Eciency
(%)
ThermalLoss
(W)
ThermalLoss
(BTU)
AMP-4-125 4 107 62.5 58.6 44.5 152
AMP-8-125 4 200 125 62.5 75 256
Standby and Idle
Model
Standby
(mW)
Idle @ 120V
(W)
Idle @ 120V
(BTU)
Idle @ 230V
(W)
Idle @ 230V
(BTU)
AMP-4-125 <500* 14.5 49 15.9 54
AMP-8-125 <500* 27.7 94 30.2 103
PowerEciencyData
ThefollowingtabledescribestheeciencyandpowerperformanceoftheAMP-4-125andAMP-8-125amplifiers.
The table also includes the derived thermal losses.
Propogation Delay Data
Thefollowingtablesdescribestheinput/outputlatencyperformanceofAMP-4-125andAMP-8-125ampliers.
*AspercompliancetoErP
Specications
AMP-4-125
OUT
Analog S/PDIF
IN
Analog 1177μS 458μS
S/PDIF 1833μS 1104μS
AMP-8-125
OUT
Analog S/PDIF
IN
Analog 1307μS 600μS
S/PDIF 1955μS 1250μS

Specifications

Indexed Terms: Matrix Amplifier

RtiControl RTI-AMP-4-125 Questions and Answers

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