PowerAcoustik PLATINUM A-75 User manual

Powerflcoustik
_PLRTIH UM_
SERIES
Model A 75
Model A IOO
Model A *125
Made in the U.S.A.

WELCOME
Power Acoustik Platinum Series amplifiers are vastly
“over built”, utilizing 35 Amp high current MOSFETs in the
regulated power supply, along with a high efficiency potted
transformer coupled to large computer grade filter capacitors
(larger size capacitors are glued to the printed circuit board
to eliminate breakage). The audio section of the Platinum
Series amplifiers use high current darlingtons in the output
stage, along with variable gain and an internal bridge switch
for ease of compatibility to all audio systems. To assure
protection of the amplifier and your audio system, the
Platinum Series amplifiers have four-way protection (ie:
Speaker to ground, Direct Speaker short, Thermal
(overheat), High/Low inhibit). Please enjoy your Platinum
Series amplifier and rest assured you have purchased one
of the finest amplifiers on the market today.
FEATURES
• Low noise MOSFET power supply
• High current Complimentary Darlington outputs
• Potted transformer for low noise
• Gold plated RCA input/output terminals
• Bridgeabie with internal bridge switch
• 4-way protection circuitry
• 2 ohm stable
• Massive extruded heatsink
• Soft start operation
• LED power/protect indicator
• Capacitors glued to PCB to eliminate breakage
• Variable input sensitivity
• Made in the USA

RATINGS
In normal stereo operation, all of the Power Acoustik Platinum
Series amplifiers will make rated power output with a 13.8Vdc input
at 4a per channel and are capable of sustaining 2Q loads in stereo
mode.
ELECTRICAL SPECS
THD+N at rated power 4 ohms
Signal to noise ratio
Frequency response
0.01%
lOOdB
5Hz to 50,000Hz
POWER SPECS
4Q/Ch.
Model A-75 . . .
Model A*100 . .
Model A-125 . .
20/Ch.
Model A-75 . . .
Model A-100 , .
Model A'l 25 . .
Mono mode:
4Q/Ch.
Model A-75 . ■■■ =. .
Model A* 100, . .
Model A'l25 . .
75W/Ch @ 4-Q
10OW/Ch @ 4Q
125W/Ch @ 4Q
120W/Ch@2^
150W/Ch@2a
180W/Ch@2Q
180W/Br @ 4a
240W/Br @ 4a
300W/Br @ 4a

INSTALLATION INSTRUCTIONS
We strongly recommend having your amplifier installed by your
dealer or a professional installer. If you have any reservations about
installing electronic components in you vehicle or do not have the
proper equipment to do so, please allow your dealer to perform the
installation. If you feel you can do the installation yourself, read the
following instruction very carefully. If you encounter any problems,
please contact your dealer.
MOUNTING THE AMP
Position the amplifier in a area with adequate ventilation such as
in the trunk or under the seat. This is necessary to dissipate the
heat radiated by the amplifier’s heat sink. It is not recommended to
mount the amplifier upside-down as this may cause the amp to go
into thermal protection prematurely. The amp should be mounted
vertically or horizontally. Be sure to mount the amplifier securely.
POWER ACOUSTIK CAN NOT BE HELD RESPONSIBLE FOR
DAMAGE OR INJURY DUE TO INCORRECT MOUNTING OF
THE AMPLIFIER .
AMPLIFIER CONNECTIONS
INPUT CONNECTIONS
Connect the right and left RCA outputs of the head unit, pre-amp
or crossover to the corresponding inputs of the amplifier. In the
bridge mode only one input needs to be used, as the bridging
switch parallels the inputs. Be sure to use high quality cables to
insure a good signal path. Remember to always route signal cables
away from power and high tension lines in the vehicle.

POWE Id :Cl 01 ,
Power - Use 8-12 gauge power cable from the battery positive (+)
to the amplifier placing the fuse or circuit breaker approximately
18" or less from the battery. Make sure this connection to the
battery is clean and secure. Coat with terminal grease or petroleum
jelly. Remember to route power cables away from signal and high
tension lines in the vehicle.
DO NOT OVER FUSE THE AMPLIFIER, AS POWER ACOUSTIK
WILL NOT BE HELD RESPONSIBLE FOR DAMAGE TO
VEHICLE DUE TO INCORRECT OR BAD WIRING INCLUDING
THE POWER WIRE AND/OR FUSE AND FUSE HOLDER.
CONSULT YOUR DEALER IF UNSURE OF THIS PROCEDURE.
GROUND - Use the same gauge cable as used on the power
connection. Amplifiers must be allowed to sink as much negative
potential to ground as it draws from the electrical system. Securely
connect the ground terminal of the amplifier to a clean grounding
location on the chassis. Coat this connection with terminal grease
or petroleum jelly. This location should be no more than three (3)
feet from the amplifier.
REMOTE - This terminal should be connected to the remote turn¬
on lead of the head unit or cascaded from another remote mounted
device. For head units with no auto antenna output, a separate
switch should be wired to allow the amp(s) be turned on or off
manually.
SPEAKER CONNECTIONS
Speaker - Connect the right positive (+) and negative(-) speaker
leads to the corresponding amplifier terminals. Repeat this process
for the left speaker taking care to maintain correct polarity. For
mono operation, connect the speaker positive (+) to the amplifiers
right positive (+) and the speaker negative (-) to the amplifiers left
negative (-). Mixed-mono systems may be built using the stereo
and mono hookups simultaneously, although this may require the
use of a passive crossover.

AMPLIFIER OPERATION
STEREO MODE
To use the amplifier in the stereo mode, connect the right and left
RCA inputs to the proper jacks on the head unit or crossover. Set
the stereo/mono switch to the stereo position. Turn the gain
counter-clockwise to a low level. Connect the power, ground,
remote and speaker wires to their proper terminals as described in
previous section.
MONO MODE
To use the amplifier in the mono mode, connect either the right
or left RCA input to an output jack on the head unit or crossover.
Set the stereo/mono switch to the mono position. Turn the gain
counter-clockwise to a low level. Connect the power, ground,
remote and speaker wires to their proper terminals as described in
previous section.
DO NOT USE LESS THAT A 40. LOAD IN THE MONO BRIDGED
MODE. EACH CHANNEL OF THE AMPLIFIER ’SEES’ HALF THE
ACTUAL LOAD IMPEDANCE UNDER THESE CONDITIONS. A 40
SPEAKER LOAD IS ’SEEN’ BY THE AMPLIFIER AS A 20 LOAD.
"MIXED MONO" MODE
To use the amplifier in a three channel capacity, connect the
highpass (satellite) speaker system as per the normal stereo
hookup. Connect the lowpass (subwoofer) system as per the mono
mode hookup. Suitable passive crossovers must be utilized with
both the high and lowpass speaker systems. Be sure not to overlap
the crossover points as this will result in lower impedances in the
region, resulting in possible amplifier failure. Please note that the
subwoofer system MUST NOT be lower than 4Q and the satellite
system not less than 20 per channel.

LEVEL ADJUSTMENTS
Set the input gain level to suit the rated output level of the head
unit or crossover. Do not exceed this level as it will cause amplifier
clipping. This adjustment should never be set to maximum.
PROCEDURE: Set the amplifier gain level to minimum and turn the
head unit volume control to a nominal point (generally the 1 or 2
O’clock position). Increase the amplifier gain until the onset of
audible distortion then back down a little. This will give you the
greatest dynamic range, Signal to Noise ratio and noise immunity.
FUSING
Use a fuse NO LARGER than noted below.
4f2/Ch.
Model A*75 . . . . . 20 Ampere
Model A-100 . .
. . 25 Ampere
Model A-125 .
. . 30 Ampere
2QICh.
Model A-75 . . . . . 35 Ampere
Model A-100 . .
. . 40 Ampere
Model A-125 . .
. . 45 Ampere
Mono mode:
4n/Ch.
Model A-75 . . .
. . 35 Ampere
Model A-100 . . . . 40 Ampere
Model A-125 . . . . 45 Ampere