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19

TROUBLESHOOTING

If the amplifier does not appear to be working, check 

for blown fuses, poor or incorrect wiring connections 

and incorrect settings.

NO SOUND?

 

1)

 Source unit volume is turned down 

or muted: Turn volume up slowly or turn mute off.

 

2) 

Low or no remote turn-on voltage: Check remote 

connections at the amplifier and source unit. Check 

with your DMM to make sure there is 12V to the 

REM wire. 

3)

 Blown Fuse on  the Amplifier: Replace 

with new fast-blow fuse (same rating). 

4)

 Power 

wires not connected: Check battery connections, 

Check grounding wire at amplifier, Use your DMM 

and check your voltage at the amplifier. 

5)

 Speaker 

leads shorted: Check speaker continuity using your 

DMM to ground (it should show no common ground). 

6)

 Speakers not connected or blown: Check speaker 

connections at amplifier and at speakers, Disconnect 

speakers at amplifier and measure coil impedance 

with DMM. 

7)

 No Audio from 1 Channel: Check 

source unit both Balance and Fader, Check all RCA’s 

that they are pushed in all of the way, Swap the RCA 

cables from Left to Right. If the problem changes 

sides you have a bad RCA cable.

DISTORTED AUDIO?

 

1)

 Gain may not be properly 

set: Review section (Calibration) for setting the Gain 

properly. 

2)

 Speaker may be damaged: Inspect each 

speaker cone for signs of damage (frozen cone, 

burned smell, separated or ripped surround or 

spider).

REDUCED BASS?

 

1)

 Speakers may be wired in 

reverse polarity: Reverse a speaker connection from 

positive to negative on the stereo or speaker.

AMPLIFIER FUSE KEEPS BLOWING?

 

1)

 Incorrect 

wiring or short circuit: Using your DMM, make sure 

that all voltage polarities are correct, Review section 

(Installation) for proper wire connection. 

2)

 Amplifier 

being driven too hard: Turn down the volume. Gain or 

Bass Boost not properly set, Review section (Tuning) 

for setting the Gain and Bass Boost properly. 

3)

 

Under-sized or faulty fuse installed: Replace the fuse 

with a fuse of the same rating in accordance with the 

manufacturer’s suggestion.

WHINING NOISE WHEN ENGINE IS ON?

 

1)

 RCA 

cables too close to power wire: Separate RCA and 

power cables, Run an extra set of RCAs on the 

outside of the vehicle, and if noise is eliminated you 

might need a better shielded RCA cable. 

2)

 Ground 

loop problem: Re-Ground the amplifier to a more 

electrically conductive location, Re-Ground the stereo 

head unit to a more electrically conductive location, 

Re-ground the amplifier to a point of the vehicle that 

is secure and not thin metal, Make sure that bare 

metal is in contact with the connector. 

3)

 Induced 

noise: Relocate components away from electrical 

noise sources such as engine control computers and 

ABS brake control modules.

AMPLIFIER SHUTS DOWN AFTER PLAYING FOR 

A PERIOD OF TIME? 1) 

Thermal protection circuits 

are shutting the amplifier off: Check the location for 

adequate ventilation (Relocate amplifier if necessary), 

Impedance may be too low and over heating the 

amplifier.

20

Summary of Contents for SRA1200.4 Shaker Series

Page 1: ...SRA1200 4 4 CHANNEL AMPLIFIER ...

Page 2: ...ker Series maximize the value of your investment Class A B Amplifiers Low Noise and Distortion Bridgeable Outputs DC to DC PWM Conversion Unbalanced Inputs Soft Turn On Discrete Signal Processing Amplifier Protection Circuits Variable Gain Control Lowpass Active Crossover Highpass Active Crossover Bypass Crossover Frequency Variable Crossovers Bass Boost Gain FEATURES INTRODUCTION FEATURES FUNCTIO...

Page 3: ...tment Knob 3 BASS BOOST Bass Adjustment Knob 4 FILTER SWITCH Filter Selector Switch 5 FREQ Filter Frequency Adjustment Knob 6 LED Power Status LED Rear Panel 7 POWER INPUT Power Cable Terminal 8 FUSE In Line Protection Fuse s 9 SPEAKER OUTPUT Speaker Wire Terminal 1 2 3 4 5 6 7 9 8 2 3 4 5 ...

Page 4: ...he engine compartment 5 6 GETTING STARTED Wiring Before you begin routing and connecting the power wires disconnect the negative ground cable from the vehicle s battery Install and connect the highest possible wire gauge the amplifier s terminal will accept 1 0 GAUGE for both power cables 12V and GND Install an in line fuse into the positive wire 18 inches away from the car battery It should be th...

Page 5: ...connect the negative battery terminal before routing cables and wires to prevent electrical shorts 1 Strip 1 2 inch of insulation off each end of the power cables 2 Connect one end of the power cable to the positive battery post 3 Install an in line fuse holder 18 inches away from the car battery 4 Route the power cable from the battery to the in line fuse holder and connect 5 Route the power cabl...

Page 6: ... the amplifier automatically when your stereo is turned on Consult with the manufacturer s user guide for your stereo head unit to locate the remote or turn on wire as some manufacturers might label their amplifier turn on feature differently GROUND 1 Locate a good non rusted chassis metal point in the vehicle 2 Mark and drill a screw hole with an electric drill where chassis ground connection is ...

Page 7: ...stereo in order to use all of the speaker outputs 4 Ch Connection Right Channel Left Channel Right Channel Left Channel Split 2 Ch Connection Right Channel Left Channel If your car stereo head unit only has two line outputs left and right RCA Y adaptors will be needed to split the left and right signals into two right channels and two left channels one of each channel for both the front and rear i...

Page 8: ...er to each output channel of the amplifier terminal 80 Hz Amplifier Crossover Settings HPF Component Speaker Wiring Amplifier Crossover Settings FLT Observing polarity connect each speaker to each output channel of the amplifier terminal 2Ω 4Ω SPEAKER IMPEDANCE 2Ω 4Ω SPEAKER IMPEDANCE ...

Page 9: ... Settings LPF Description Gain This feature controls the audio input signal strength going into the amplifier Bass Boost Increases the bass level from 1dB up to 18dB LPF Low pass filter that reduces the signal level of frequencies above the bass region FLT Crossover setting that disables and bypasses the internal crossover HPF High pass filter that reduces the signal level of frequencies below the...

Page 10: ...e significantly and amplifier failure could occur If Bass Boost is used keep the Gain setting down Setting Bass Boost 1 Turn the gain and bass control all the way down counterclockwise 2 Turn the vehicle on and make sure the source unit is turned on 3 Insert a CD DVD with undistorted music 4 Start to increase the volume at the source unit until you hear distortion aproximately at 90 5 Turn the vol...

Page 11: ...REDUCED BASS 1 Speakers may be wired in reverse polarity Reverse a speaker connection from positive to negative on the stereo or speaker AMPLIFIER FUSE KEEPS BLOWING 1 Incorrect wiring or short circuit Using your DMM make sure that all voltage polarities are correct Review section Installation for proper wire connection 2 Amplifier being driven too hard Turn down the volume Gain or Bass Boost not ...

Page 12: ...idged THD N 4Ω FREQ RESPONSE LOWPASS SUBSONIC BASS BOOST INPUT SENSITIVITY INPUT IMPEDANCE S N RATIO CH SEPARATION FUSE DIMENSIONS WIDTH inches HEIGHT inches DEPTH inches SRA1200 4 4 300W 600W 1200W 0 05 20Hz 25kHz 50 250Hz N A 0dB 12dB 200mV 8V 22k Ω 90dB 60dB 40A 11 75 9 94 2 40 ...

Page 13: ...edy claim of your warranty service Contact VM Audio directly to find the Authorized Dealers nearest you In the case the defective merchandise needs to be returned to VM Audio please contact us and a Return Merchandise Authorization RMA number will be assigned It is important to pack all defective items in the original packaging to prevent damages from shipping and be sure to write the RMA number c...

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