INTRODUCTION
Amplifiers provide high-performance sound reinforcement for your mobile audio equipment.
It s versatility enables compatibility with optional Equalizers, Frequency Dividing Network
Crossovers, and other audio processors in a customized system. The Multi-Mode bridging
Capabilities allow flexibility in hosting several different speaker configurations.
Toachieveoptimumperformance,itishighlyrecommendedthatyoureadthisOwner’s
Manual before beginning installation.
FEATURES
WARNING
High powered audio systems in a vehicle are capable of generating Live Concert high
levels of sound pressure, Continual exposure to excessively high volume sound levels may
cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio
equipments at high volume levels may impair your ability to hear external sounds such as;
horns, warning signals, or emergency vehicles, thus constituting to a potential traffic hazard.
In the interest of safety,ConsumerElectronicsrecommendslisteningatlowervolumelevels
While driving.
2
SRX-D0504; SRX-D1501; SRX-D2501; SRX-D4001
65-C5009-MA
：A3
Model No.:
Owner'sManual
PWM PowerSupply
3 StageProtectionCircuit
SMDTechnology
MIL-Spec FiberglassCircuitBoard
TrueDigitalSwitching
High RailVoltage
2 OhmStable
Compact Chassis
Full MOSFETCircuitry
High LevelInput
Line Output
Bass Boost@45Hz+6dBor+12 dB(Sub woofer Amplifier)
18 dBCrossoverCenteredat80Hz(Sub woofer Amplifier)
Selectable HPF/LPF@80Hzcrossover(FullRangeAmplifier)
TABLE OF CONTENTS PLANNING YOUR SYSTEM
Before beginning the installation, consider the following:
a. If you plan to expand your system by adding other components sometime in the future,
ensure adequate space is left, and cooling requirements are met.
b. Speaker level or RCA, which to use and why?
If your source unit is equipped with both types of outputs, Use the RCA’sfortheamplifier
inputs, as this provides for increased bandwidth and you can still utilize the speaker
Outputs, for driving the (smaller) front speakers directly.
NOTE:
DISTORTION LEVEL IS CONSIDERABLYLOWER FROM PRE-AMP(LOW LEVEL) OUTPUTS, THAN SPEAKER
(HIGH LEVEL)OUTPUTS.
c. Are your components matched? The peak power rating of your speakers must be equal
or greater than the Amplifier’s. They also must be 2-8 Ohms impedance(This information
is normally printed on the speaker magnet).
d. Consider both the length of your leads, and routing when determining the mounting
location. Pre-Amp input Jacks require a length of high quality shielded male to male RCA
patch cord.
MOUNTING YOUR AMPLIFIER
The mounting position of your Amplifier will have a great effect on its ability to dissipate the
heat generated during normal operation. It has an ample heat sink for heat dissipation, and it is
also designed with a thermal shut-down(for heat protection)circuit, making air to be
directed over the cooling fins will improve heat dissipation dramatically. DO NOT enclose
the amplifier in a small box or cover it so that air cannot flow around fins.
Temperaturesincartrunkshave been measured as high as 175F(80c)in the summer time.
Since the thermal shut-down point for the Amplifier in 185 F(85c)it is easy to see that it must
be mounted for maximum cooling capability. To achieve maximum advantage of
convection air flow in an enclosed trunk, mount the amplifier in a vertical position, on a
vertical surface.
’’
’’
Cooling requirements are considerably relaxed when mounting inside the passenger
compartment since the driver will not often allow temperatures to reach a critical point.
Floor mounting under the seat is usually satisfactory as long as there is at least 1 inch(2cm)
above the Amplifier’s fins for ventilation.
a. Select a suitable location that is convenient for mounting, is accessible for wiring, and
has an ample room for air circulation and cooling.
b. Use the amplifier as a template to mark the mounting holes. Remove the Amplifier and
drill 4 holes. With extreme caution, inspect underneath surface before drilling.
c. Secure the Amplifier using the screws provided.
43
PLANNING YOUR SYSTEM ................................................ 4
MOUNTING YOUR AMPLIFIER ........................................... 4
WIRING CONNECTION .................................................... 5-7
POWER INDICATOR LED ................................................... 7
INPUT SENSITIVITY CONTROL ............................................. 7-8
CONNECTING THE SPEAKER ............................................ 8-10
TROUBLE SHOOTING GUIDE ............................................. 11
WARNING ....................................................................... 12
SPECIFICATION ............................................................... 12
B. BASS BOOST
By using the bass boost function the deepest bass notes at 50Hz are emphasized.
A. CONNECTING THE POWER
CAUTION:
AS A PRECAUTION, IT IS ADVISABLE TO DISCONNECT THE VEHICLE S BATTERYBEFORE MAKING CONNECTION
TO THE +12 VOLTS SUPPLY WIRING.
4/8 GAUGE (Or thicker if planning for additional Amplifiers) wire is recommended for both the
power and ground wires. 12 Gauge, for the remote turn wire. Both types are
available at most Mobile Audio Dealers or Installation Shops.
(1)GROUND: To Vehicle Chassis
Toavoid unwanted ignition noise caused by ground loops, it is essential that the
Amplifier be grounded to a clean, bare, metal surface of the vehicles chassis.
GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT. (1 METER).
(2)+12Volt (Fused) Constant Power: To Battery (+)
Due to the power requirements of the Amplifier, this connection should be made
directly to the positive (+) terminal of battery. For safety measure, install an in-line Fuse
Holder (not included) as close to the battery positive (+) terminal as possible with an
ampere rating:not to exceed total value of fuses in Amp.
(3)Remote Turn-On Input: To Power Antenna output of Car Stereo
This Amplifier is turned “ON” remotely when the vehicle’s stereo is turned “ON” .
NOTE:
IF YOUR SOURCE UNIT DOES NOT HAVEAN ACTIVE +12 VOLT LEAD WHEN IT IS TURNED-ON, YOU CAN
EITHER INSTALLAN AUXILIARY SWITCH, OR YOU CAN TAP-INTO AN IGNITION LEAD; NOTE HOWEVER, THAT
YOUR AMPLIFIER WOULD TURN-ON, EVERY TIME YOU START YOUR CAR IF YOU CHOSE THE IGNITION OPTION.
WIRING CONNECTIONS
12V
REM
GND
POWER INPUT
Vehiclechassis ground
Remote Turn-ON is
connected to Radio’s power
antenna lead or a switchable +12V
Fuse
Near Battery
BATTERY
REACT4-900/REACT1-700/REACT1-1100/REACT1-1800
REACT4-900:
25
REACT - 00: 0A
REACT1- 00: 2 A 2
25A x 2
REACT1-700: A
111 4
18 5 x
65
NOTE:
REACT4-900
SPEAKER
LEVEL INPUT
CH1
CH2
CH3 CH4
CROSSOVER
GAIN
MIN MAX
MIN MAX
LPF FR HPF
CH3/CH4
HPF
FR
LPF
GAIN
CROSSOVER
CH1/CH2
POWER
CH1 CH2 CH3 CH4
INPUT
CH3 CH4
OUTPUT
CHASSIS GROUND-Black
1 CH(+)
1 CH(-) 2 CH(-)
2 CH(+)
3 CH(+)
3 CH(-) 4 CH(-)
4 CH(+)
REACT1-700/REACT1-1100/REACT1-1800
GAIN
MIN MAX
POWER
SPEAKER
LEVEL INPUT
CH1 CH2
CH2
CH1
0dB 12dB
6dB
REMOTE
BASS BOOST
1 CH(+)
CHASSIS GROUND-Black
2 CH(+)
1 CH(-)
2 CH(-)
REMOTE
CONTROL
MINMIN MAX
CH1 CH2 CH1 CH2
INPUT
OUTPUT
C. CONNECTING HIGH LEVEL INPUTS
NOTE:
DO NOT CONNECT THESE HIGH LEVEL INPUT WIRES IF YOU ARE USING THE LOW LEVEL INPUT RCAJACKS.
CAUTION
NOTE THAT ONLYPOSITIVE (+) WIRES ARE USED. DO NOT CONNECT SPEAKER NEGATIVES.
F. CONNECTING LOW LEVEL INPUTS (RCA Jacks)
NOTE:
DO NOT USE IN CONJUNCTION WITH HIGH LEVEL INPUT WIRES.
Wire routing is CRITICAL for NOISE FREE PERFORMANCE, Observe the following:
1. Always use high quality RCA type shielded cables.
2. Always use the shortest lenght possible. If the cable is too long, make an “S” type
loop (not a coiled loop) in the center of the cable to take up any excess.
3. Never cut the shielded cable and re-splice it.
4. Never route any Amplifier input cables near nor parallel to speaker outputs, high
energy ignition wires, nor near computer controlled ignition circuit units (Computer
units may be found behind or under the dash panel in late model cars).
POWER INDICATOR LED
This METER LAMP will illuminate when the amplifier is turned “ON” . If it fails to illuminate,
check the power connections to the Amplifier and fuses.
PROTECTION CIRCUIT
Should the Amplifier be “SHORT CIRCUITED” overloaded or overheated, the protection
circuit will “SHUT-DOWN” theAmplifier.
CAUTION
THIS AMPLIFIER WAS DESIGNED TO BE USED WITH EITHER 2 OHM STEREO/CHANNELOR 4 OHM EACH
MONO BRIDGED CHANNEL. IN THE CASE OF TRI-MODE OPERATION, USE EITHER 8 OHM STEREO CHANNEL
SPEAKERS AND 4 OHM SUB OR VICE VERSA. SEE THE SECTION “TRI-MODE” FOR FURTHER INFORMATION
ON PROPER USE.
INPUT SENSITIVITY(LEVEL) CONTROL
In order to achieve maximum signal-to-noise performance, this control adjusts the signal
level from your Car Stereo/Source, to match the Amplifier sensitivity. It is NOT a volume
control.
a. Set INPUT LEVEL Control at mid-point.
b. Listen for audible distortion as you increase the Car Stereo VOLUME control. If none
is heard, turn the adjustment level control toward to “MAX” in stages, until the onset of
audible distortion is heard, then decrease to “MIN” level prior to the immediate
point of audible distortion.
C. If distortion is immediately heard, turn control to “MIN” until the sound is clear.
To adjust, proceed as follows:
NOTE:
NOT PERFORMING ABOVE ADJUSTMENT PROCEDUREAND/OR SIMPLY SETTING THIS CONTROL AT OR NEAR
“MAX” POSITION, MAYINDUCE ELECTRICAL AUDIO NOISE INTO THE SYSTEM.
CONNECTING THE SPEAKERS
(A)DUAL MONO MODE
87
REACT4-900
REACT1-700/REACT1-1100/REACT1-1800
REACT1-700/REACT1-1100/REACT1-1800
Input Sensitivity Control
SPEAKER
LEVEL INPUT
CH1
CH2
CH3 CH4
CROSSOVER
GAIN
MIN MAX
MIN MAX
LPF FR HPF
CH3/CH4
HPF
FR
LPF
GAIN
CROSSOVER
CH1/CH2
POWER
Input Sensitivity Control
GAIN
MIN MAX
POWER
SPEAKER
LEVEL INPUT
CH1 CH2
CH2
CH1
0dB 12dB
6dB
REMOTE
BASS BOOST
2 CHANNEL
4-8 Ohm
SPEAKER
FUSES
REM
GND
B
1 CHANNEL
4-8 Ohm
CH1 CH2 CH3 CH4
INPUT
CH3 CH4
OUTPUT
CH1 CH2 CH1 CH2
INPUT
OUTPUT
(C)TRI MODE
TRI MODE OPEATIONALOUTPUT allows a Crossover (Subwoofer) to be operated in MONO
mode while the main speaker is playing in stereo.
Leave the Crossover (Subwoofer) Switch on “FULL” position.
Use a 100Volt, non-polar capacitor for a high pass crossover and a wire coil (inductor) to
block high frequencies from the Crossover (Subwoofer) as shown in the figure below.
Capacitor and inductor values as written in the below determine the crossover
frequencies.
The front and rear channels of this amplifier get this capability.
Only the rear left and right channels are shown below.
REM GND
12V
FUSES
CH1
CH3
CH2
CH4
BRIDGED
COMPONENTVALUES FOR 6dB PASSIVE CROSSOVER
FREQUENCY
80Hz
100Hz
120Hz
150Hz
INDUCTOR CAPACITOR
7.5mH
6.5mH
5.5mH
4mH
470uF
330uF
330uF
220uF
()A 4 CHANNEL MODE
9
REACT4-900
(B) MODESINGLE MONO
SPEAKER
FUSES
REM
GND
B
SUB WOOFER
2-8 Ohm
CAPACITOR
LOW PASSFILTER
()B 4 CHANNEL BRIDGED MODE
REM
GND
12V
FUSES
CH1
CH3
CH2
CH4
BRIDGED
SUB WOOFER
4-8 Ohm
SUB WOOFER
4-8 Ohm
10
3CH
2-8 Ohm
4CH
2-8 Ohm
1CH
2-8 Ohm
2CH
2-8 Ohm
REM GND
12V
FUSES
CH1
CH3
CH2
CH4
BRIDGED
3CH
2-8 Ohm
4CH
2-8 Ohm
1CH
2-8 Ohm
2CH
2-8 Ohm
TROUBLE SHOOTING GUIDE
SYMPTOMS CHECKPOINTS CURE
NO SOUND
In the power
LED illuminated?
Check fuses in amplifier.
Be sure Turn-on lead is connected
Check signal leads. Check gain
control.
Check Tuner/Deck volume level.
Clean contacts on fuse holders.
Is the Diagnosis
LED illuminated?
Check for speaker short or
amplifier overheating.
AMP NOT
SWITCHING
ON
No power to power wire
No power to remote
wire with receiver on
Fuse broken
Repair power wire or connections.
Check connections to radio.
Check fuse
NO SOUND
IN ONE
CHANNEL
Check Speaker Leads
Check Audio Leads
Inspect for short circuit or an
open connection.
Reverse Left and Right RCA inputs
to determine if it is occurring
before the amp.
AMP
TURNING OFF
MEDIUM/HIGH
VOLUME
Check Speaker load
impedance
Be sure proper speaker load
impedance recommendations
are observed.
(If you use an ohmmeter to check
speaker resistance, please
remember that DC resistance and
AC impedance may not be the
same. )
PROTECTION
LED ON (RED)
Temperatureshutdown
Speaker wires short circuit
Turn radio down
Separate speaker wires and insulate
1211
WARNING
SPECIFICATIONS
Investigate the Layout of you automobile thoroughly before drilling or cutting any
holes. Take care when you work near the thanks, lines, or hydraulic lines, and
electrical wiring. Don’t mount this system so that the wire connections ate
unprotected are subject to pinching or damage from nearby objects.
The +12V DC power wire must be fused at the battery positive terminal connection.
Before making or breaking power connections at this system power terminals,
disconnect the +12V wire at the battery end.
Cofirm your radio/cassette player and/or other equip is turned off while connecting
the input jacks and speaker terminals.
If yiu need to replace the power fuse, replace it only with a fuse identical to that
supplied with the system. Using a fuse of differenct type ot rating may result in
damage to this system which isn’t covered by the warranty.
MODEL NO
MAX Power
RMS @4O hm
S/N Ratio
Frequency
Response ( 1dB)
Dimension(inches)
REACT4-900
REACT1-700 REACT1-1100
REACT1-1800
RMS @2O hm
T.H .D
Fuse
BASS Knob
900W
700W
1100W 1800W
0.02% 0.02% 0.02% 0.02%
98dB 98dB 98dB 98dB
25A x 2 25A
20Hz-20KHz 50Hz-150Hz 50Hz-150Hz
2.3X11.7X10CM 2.3X11.7X6.5CM 2.3X11.7X7.3CM 2.3X11.7X11CM
175WX1 300WX1
500WX1
250WX1 400WX1
700WX1
40A
25A x 2
70W x 4
100W x 4
65-C5009-MA
50Hz-150Hz
No Yes
Yes
Yes
FEATURESAND SPECIFICATIONSARE SUBJECT TO CHANGE WITHOUT NOTICE.
Power Acoustik
CH 4CH 1CH 1CH 1CH
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