EFX 500c1 Installation Manual Download Page 7

TROUBLE SHOOTING

Use a volt meter to verify voltages at
terminals of ampl12V Inputs
hould have a minimum of 11.5 volts
while ignition of vehicle is ON or OFF.
Use voltmeter to verify voltage at 
terminal of amplifiers REM input. REM 
input should have 12 volts while Car 
Stereo is "ON" and 0 volts While "OFF".
Check main power connection and
fuse at battery. 

Disconnect all speakers but not +12V,
GND or REM lines - if unit then turns 
on, a speaker or speaker line may be
touching vehicle chassis. Check 
Speakers and speaker lines for shorts.

No Voltage on +12V Input.

No Turn-On from Car Stereo

Bad Connection at Battery or Fuse at Battery

Shorted Speaker line or connections.

Amplifier will not
turn on or No power
power light not on.

Check Low level (RCA) connections.
Be sure they are connected at Car
Stereo and amplifier. Check all Speaker 
output connections.
Disconnect Speaker from Amplifier.
Verify speaker impedances. For Stereo/
2-channel mode speakers should be 
2ohm or 4ohm each. For Bridged mode
speaker(s) should be no less than 
4ohms. Speaker impedances can be
found by checking speaker manufac-
turer specification or using a Digital 
Volt/Ohm meter. If you need further 
assistance please call 800-621-3695x3.

Bad connection on RCA plugs or speakers 
are not connected correctly.

Speakers wrong impedance over loading 
amplifier.

Power but no sound.
(Indicator is GREEN)

Check Car Stereo’s balance and fader
control positions - verify they are 
centered. 
Check speaker connections at amplifier 
and speaker.
Check all input leads at amplifier. 
Be sure RCA’s are connected to Car 
Stereo and amplifier. Check High level
inputs for connection to amp verify
connections.
Check input switch position and retest.

Car Stereo’s balance and fader controls set 
incorrectly.

Bad Connection at Amplifier or Speaker.

Bad Input Via RCA or Hi level inputs.

Input Switch in the wrong position.

No sound from one
channel or entire
side.

Check Car Stereo’s balance and fader
control positions - verify they are
centered.

Check amplifier’s input gain control
settings - adjust levels if necessary.

Car Stereo’s balance and fader controls 
set incorrectly.

Amplifier’s input gain control setting is 
not correct.

Very low sound 
level.

Check +12V connections at the battery 
and amplifier inputs.

Verify battery voltage. Voltage should
be greater than 11.5 volts DC at 
amplifier with engine off.

Check Car Stereo and amplifier’s
ground connections.

Power amplifier 
turns on and off 
repeatedly.

Low Voltage on +12V Inputor Connections at 
Battery.

Low vehicle Battery Voltage.

Bad Connection on Car Stereo or Amplifier.

MORE TIPS ON PAGE 8

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Summary of Contents for 500c1

Page 1: ...l Minimum Input Signal 200mV Low Level 420mV High Level 1000c1 SPECIFICATIONS Power Output 350 Watts RMS x 1 Channel at 4 Ohms and 1 THD N Signal to Noise Ratio 80 dBA reference 1 Watt into 4 Ohms Add...

Page 2: ...s away from wires that may carry high current WARNING MAKE SURE YOU CHECK TWICE DRILLING THROUGH ANY ELECTRICAL WIRES FUEL LINES OR ANY OTHER VEHICLE SYSTEMS MAY CAUSE INJURY OR DEATH AMPLIFIER STATUS...

Page 3: ...ost 0 12dB 45Hz Use Caution while adjusting Bass Boost Using to high of a setting may cause distortion or damage Speakers MIN MAX 0dB 12dB 3 PHASE REMOTE MASTER SLAVE 0 180 IN OUT L R L R LOW PASS 200...

Page 4: ...he Power Antenna turn on or Car Stereo s Accessory wire The Accessory wire will have 12 Volts while the Ignition is in the ON RUN or ACC position and no voltage while ignition is off If you use the po...

Page 5: ...SS D AMPLIFIER ON PROT GND POWER B REM PHASE HI INPUT GND L R REMOTE MASTER SLAVE SLAVE MASTER LEVEL MAX MIN BASS 12dB 0dB LOW PASS 200Hz 40Hz 0 180 IN OUT 25A 25A 25A 25A L R L R LOW INPUT LINE OUTPU...

Page 6: ...to the Slave audio IN on the Second amplifier Set the switch on the 2nd Amplifier to the Slave position Connect the Negative outputs between the amps with NO LESS than 8 AWG wire Use the Positive spe...

Page 7: ...l 800 621 3695x3 Bad connection on RCA plugs or speakers are not connected correctly Speakers wrong impedance over loading amplifier Power but no sound Indicator is GREEN Check Car Stereo s balance an...

Page 8: ...s in material and workmanship for a period of 1 year from purchase This EFX Audio product is sold with the understanding that the purchaser has independently determined the suitability of this product...

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