OWNER'S MANUAL
PB618/PB718/PB918/PB2518/PB3818
www.ramidcaraudio.com
INTRODUCTI
ON
(PB618)
Thank you for purchasing the
Pyramid
AMERICA High Speed Power
Amplifier.
The AMPLIFIER has been designed using the latest electron
ic technology
avail
a
ble.
The AMPLIFIER is with engineered features allowing you to prod uce high quality
stereo reproduction in mobile applications. This innovative system has been deSigned
A 12 volts DC negative ground power supply. Easy installation with mounting
Hardware is provided.
The
PB618
utilizes 8 MOSFETS 2 TRANSFORMER inits
design to produce enou gh voltage to supply the main amplifier and a huge
considerable amount of reserve voltage for peak "high demand" situations.
2
1.High level input
2.Low level input
3.1 nput level control
4.Fully adjustable high/low
pass crossover
2
5. Bass boost control
6.Low pass ntrol
7.High pass control
8. Power on LED inditor
9. Protection LED inditor
10.Power supply terminals
11.P owerfuse
12.Speaker output terminals
FUNCTIONS (PB618)
1.HIGH LEVEL INPUT (LOW IMPEDANCE)
If your car stereo does not have RCA output jacks, you can connect the
speaker output from the stereo system to the amplifier.
2.LOW LEVEL INPUT (HIGH IMPEDANCE)
This unit is provided with RCA input jacks for High impedance input.
Couple the RCA input with the car stereo output using RCA type connector
cables.
3.LEVEL CONTROL
Adjusting the control will match the output of the stereo to the amplifier. Turn
the control clockwise for more volume and counter-clockwise for less volume if
there is distortion when the volume of stereo is turned up, turn the control
down.
4.FULLILPF/HPF CROSSOVER SWITCH
For use with normal full range systems, this selector should be set to the
FULL position. If this AMPLIFIER is being utilized to power a CROSSOVER
system, this selector should be set to either the HPF(HI PASS FILTER) or
LPF(LOW PASS FILTER) position to enable the built-in electronic crossover.
S.BASS BOOST CONTROL
The Bass-Boost dial increases the bass signal to the speaker.
6.LOW PASS CONTROL
The LPF 40Hz/350Hz lets you adjust the crossover frequency from 40Hz
to 350Hz, this control is useful only for subwoofers and not you main speakers.
7.HIGH PASS CONTROL
The HPF 80 Hzl2.5KHz lets you adjust the crossover frequency from 80 Hz
to 2.5KHz. lets you set the tweeter speakers.
8.POWER ON LED
Lights up when the remote on system is energized.
3
FUNCTIONS (PB618)
9.PROTECTION LED
The protection circuitry will disable the amplifier if it senses an input overload,
speaker short circuit of extreme high temperature conditions. When the protec
tion circuit is in operation the LED indicator on the unit will light indicating that
the
amplifier has gone into a self preservation mode. At this time please check
your system to see what is causing the protection circuit to fire. The amplifier
can
be reset by turning the remote power o and then on again. If the system
shuts down because of a thermal overload condition, allow the amplifier to cool
down
before restarting If the amplifier shutdown because of an input overload
or speaker short circuit please be sure to correct these conditions before
restarting the amplifier.
10.POWER SUPPLY
A. +12V
To connect +12V DC power supply wire from the terminal of battery.
B. GROUND
To connect the ground wire from the chassis of the automobile.
C. REMOTE
To connect the control wire which provides remote turn on and o of the ampli
fier by the radio/cassette player. (Usually The Auto Antenna Lead)
11.POWER FUSE
The
power fuse protects both this amplifier and the automobile electrical
system from short circuit conditions.
12.SPEAKER TERMINALS.
The speaker terminals are for high conductivity and minimum impedance loss.
The terminals are facing upwards for easy wiring in tight situations. Be sure
to strip just enough insulation o your speaker wires that will fit under the
screw plate to help ensure against speaker wire sho circuits.
13.TRI-MODE BRIDGING CAPABILTY.
The Amplifier can be bridged into the following systems.
A three channel Mode. Bridge Channels 3 & 4 into one high power channel for
subwoofer application while leaving channels 1 & 2 in the stereo mode for satel
lite components.
B. Two Channel Mode. Bridge channels 1 & 2 into one high powered channel.
Bridge channels 3 & 4 into a second high powered channel. Be sure to utilize
speaker which can handle at rated power on the bridged channels.
14.MUTE TURN ON CIRCUIT
4
The Amplifier features an anti-thump delay circuit. This circuit eliminates irritat
ing thump noise some times experienced with cheaper amplifiers when they are
turned on.
ELECTRICAL & AUDIO CONNECTIONS
(PB618)
A. STEREO INPUT CONNECTION
NOTE: Do not use both low and high level inputs simultaneously!
RCA TYPE TERMINAL
This ampler is provided with gold plated RCA terminals for LOW LEVEL
INPUT to match radios and equalizers with line level output.(Fig. 1A)
If you STEREO has only RIGHT and LEFT outputs then you must use
a Y-adaptor connecting the stereo to the amplifier as indicated.
(Fig. 1 B)
WHEN YOU WANT TO BRIDGE THE AMPLIFIER PLEASE COMPLET THE
FOLLOWING STEPS.
1. If your STEREO only use RIGHT and LEFT outputs. please wire as (Fig. 2A)
2. If your STEREO has four channel outputs please wire as (Fig. 2B).
NOTE: Do not use both low and high level inputs simultaneouslyl
(Fig. 1A)
5
ELECTRICAL & AUDIO CONNECTIONS
(PB618)
6
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High Level Input Leads
(To Radio Unit speaker Output)
High Level Input Leads
(To Radio Unit speaker Outout)
(Fig. 1 B)
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Y-Adap'"' T-Adap,m
(Fig.2A)
ELECTRICAL & AUDIO CONNECTIONS
(PB618)
;
High Level Input Leads
(To Radio Unit speaker Output)
(Fig. 28)
;
High Level Input Leads
C Stereo System
(To Radio Unit speaker Output)
(Four Channel Line Output)
B. SPEAKER CONNECTIONS
You do not need to make any adjustment for the input connection of Amplifier
before you connect the speaker output.
1.
4 Channel Output Mode
Connect the speaker output terminals to the corresponding speaker. (Fig. 3A)
(Fig.3A)
7
ELECTRICAL & AUDIO CONNECTIONS
(PB618)
8
2.
2 Channel Output Mode
You may want to bridge the Amplifier to a 2 CHANNEL output amplifier.
use high quality speakers which are capable of handling the high power
output. In this mode only the 1-2CH and 3-4CH speaker will be activated.
(F
ig
.3B)
(Fig.3B)
C.2-CHANNEL STEREO OUTPUT COMBINED WITH MONO
SUBWOOFER OUTPUT MODE
(a)SUBWOOFER
Connect the speaker to the 3-4CH speaker terminal.
(b)2-CHANNEL STEREO
The RIGHT signal output from 2-RIGHT speaker terminal.
The LEFT signal output from 1-LEFT speaker terminal.
INTRODUCTION (PB718/PB918/PB2518/PB3818)
O
1.High level input
2.Low level input
3.Aux line output
4.lnput level ntrol
5.Bass boost ntrol
6.Low pass control
7
.High pass ntrol
�O
8.F ully adjustable high/low
pass crossover
9.Power on LED indicator
10.Protection LED indicator
11.Power supply terminals
12.Power fuse
13.Speaker output terminals
9
FUNCTIONS (PB718/PB918/PB2518/PB3818)
1. HIGH LEVEL INPUT(LOW IMPEDANCE)
If your car stereo does not have RCA output jacks, you can connect the
speaker output from the stereo system to the amplifier.
2. LOW LEVEL INPUT(HIGH IMPEDANCE)
This unit is provided with RCA input jacks for High impedance input.
Couple the RCA input with the car stereo output using RCA type connector
cables.
3. AUX LINE OUTOUT
This amp features RCA jacks or AUX line output.
4. INPUT LEVEL CONTROL
Adjusting the control will match the output of the stereo to the amplifier.
Turn the control clockwise for more volume and counter-clockwise for less
volume if there is distortion when the volume of stereo is turned up, turn
the control down.
5. BASS BOOST CONTROL
The Bass-Boost dial increases the bass signal to the speaker.
6. LOW PASS CONTROL
The LPF 50Hz/250Hz lets you adjust the crossover frequency from 50Hz to
250Hz, this control is useful only for subwoofers and not you main speakers.
7. HIGH PASS CONTROL
The HPF 120Hz/3kHz lets you adjust the crossover frequency from 120Hz
to 3kHz, lets you set the tweeter speakers.
8. FULL/LPF/HPF CROSSOVER SWITCH
For use with normal full range systems, this selector should be set to the
FULL position. If this AMPLIFIER is being utilized to power a CROSSOVER
system, this selector should be set to either the HPF (H IGH PASS FILTER)
or LPF (LOW PASS FILTER) position to enable the built-in electronic
crossover.
9. POWER ON LED
Lights up when the remote on system is energized,
10
FUNCTIONS (PB718/PB918/PB2518/PB3818)
10. PROTECTION LED
The protection circuitry will disable the amplifier if it senses an input over
load, speaker short circuit of ex treme high temperature conditions. When
the protection circuit is in operation the LED indicator on the unit will light
indicating that the amplifier has gone into a self preservation mode. At this
time please check your system to see what is causing the protection circuit
to fire. The amplifier can be reset by turning the remote power off and then
on again. If the system shuts down because of a thermal overload condition,
allow the amplifier to cool down, before restarting. If the amplifier shutdown
because of an input overload or speaker short circuit please be sure to cor
rect these conditions before restarting the amplifier.
11. POWER SUPPLY
A. +12V
To connect +12V DC power supply wire from the terminal of battery.
B. GROUND
To connect the ground wire from the chassis of the automobile.
C. REMOTE
To connect the control wire which provides remote turn on and off of the
amplifier by the radio/cassette player.(Usually The Auto Antenna Lead)
12. POWER FUSE
The power fuse protects both this amplifier and the automobile electrical
system from short circuit conditions.
13. SPEAKER OUTPUT TERMINALS
The speaker terminals are for high conductivity and minimum impedance
loss. The terminals are facing upwards for easy wiring in tight situations.
Be sure to strip just enough insulation off your speaker wires that will fit un
der the screw plate to help ensure against speaker wire short circuits.
11
ELECTRICAL&AUDIO CONNECTIONS
( PB718/PB918/PB2518/PB3818)
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D.POWER CONNECTION
1. Connect the B +12V pole of power supply directly to the battery (+)position
terminal.
2. Connect the GND pole of power supply directly to the (.) negative ground
battery terminal or car chassis.
3. To make a good grounding and prevent motor boating noise problem con·
nect another 12 gauge minimum wire from the (-) negative battery terminal
to chassis of stereo unit.
4. Connect the 'Remote' pole to external switch for positive 12V ON/oFF. This
may be connected to the receiver power antenna lead.
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13
INSTALLATION
The Amplifier comes complete with all mounting hardware, While the Amplifier can
be mounted in any convenient location in your vehicle, please remember that this
is a high power unit which generates high electrical energy and heat Therefore be
sure to install the unit in a place with sufficient airflow, a minimum of dust and no
moisture. Allow enough space around the cooling fins to permit reasonable airflow
and cooling.
Choose a suitable location to mount the amplifier so that it is protected from vibration.
Check clearance all around the amplifier be sure to leave enough room for wiring.
Secure the amplifier tightly. Do not leave an unmounted amplifier in your car trunk
or deck as it can be a driving hazard should you be forced to make a sho stop.
14
TESTING AND SPECIFICATIONS
J
1.
After all the connections have been made, turn on your stereo and listen for the
amplifier to turn on. If there are any unusual noises from the speakers then turn
the system off and recheck all wiring.
2. After you have connected your radio or requallzer to the amplifier, you may ad
just the gain control to match the output level of your radio.
(A) Set the volume control on you radio to 2/3 position
(8) Adjust the gain control for an average listening level.
(e) Turn the radio volume all the way down nd listen for background noise.
(D) Start your vehicle and listen for ectrical noise.
(E) Making fine adjustments to the sensitivity can reduce background noise and
Some engine noise.
(F)
CAUTION: Never turn the sensitivity up any farther than you need to get
clear sound at 2/3 volume.
(G) This adjustment only needs to be made once.
15
TESTING AND SPECI FICATIONS
SPE CI FI CATIONS
1.
Output Power @ 14.4 VDC 1 KHZ .............................................. .
RMS power @4ohms
PB618: 50Wx4
PB718:
35Wx2
PB918: 50Wx2
Pb2518:
75W x 2
Pb3818: 100Wx2
RMS power @ 2 ohms
100Wx4
70Wx2
100Wx2
150Wx2
200Wx2
RMS power @ 1 ohms MAX power Output
2000W
1000W
2000W
3000W
5000W
PB618 =200W X 2 or 2000W x 2 and 200W x 1
2 B
'
d dM d
PB718 =150Wx 2or 1000Wx 2and 200Wx 1
. rI ge
0
e ...........
PB918 = 200Wx 2 or 2000W x2 and 200W x 1
PB2518=300W x2 or 3000W x 2 and 300W x1
PB3818=500W x2 or 5000W x 2 and 500Wx1
3. Frequency Response ............................... 1 0-30,000 Hz (±3 dB)
4. Input Impedance
....................................... 10K Ohms (Low Level)
100 Ohms (High Level)
5. Input Sensitivity ............................................ 250mV (Low Level)
2.5V (High Level)
6. Power Supply Voltage.
........... DC 14.4V Negative Ground 10.5-16V)
7.
Matching Speaker Impedance
...................
Stereo Mode: 2-4 Ohms
Bridged Mode: 4-8 Ohms
.
PB618=20Ax 2
PB718=25Ax1
8.
MaXimum
Current
D
ra
............
.
'
PB918=30Ax
1
PB2518=35Ax1
PB3818=30A x 2
..
PB618=260 x 5
7
.5 x 350mm (W x H x L)
9.
Dimensions
.........
.........
PB718
=
260x 57.5x 2
15mm (WxHx
L)
PB918=260 x 57.5 x230mm (W x H x L)
Pb2518=260 x 57.5 x280mm(W x H x L)
Pb3818=260 x57.5 x350mm (W x H x L)
.
PB618 3.9kg
10. Net Welght.. ...............
PB
7
18
2.496kg
16
PB918 2. 654kg
PB2518 3.264kg
PB3818 3.962kg
IYEIOEIIDCAUDIO C
RIF : J-31213319-8
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www.amidcaraudio.com
