Question about Pioneer GM-X372 Car Audio Amplifier

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No sound from the amp

The red light is flickering on the amp and no sound from the speakers i have no manual to refer to please help

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Re: no sound from the amp

With your multimeter set to DC volts and the black meter lead on the ground terminal of the amp, touch the red lead alternately to the B+ and remote terminals. If the voltage drops below ~11 volts, you need to check the wiring feeding whichever line is dropping too low.

If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up and the light stays on, the wiring needs to be checked. If it still shuts down, the amp likely has at least 1 blown output IC.

Posted on Nov 30, 2007

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Hooked the damn thing up power my subs wonderfully for that evening, and all day today, got in this evening and nothing, checked the amp and red light, ok, fine, checked the manual, says the light protects...

probably something corssed in your speaker wiring. be sure that you did not exceed the ohmage capabilities of the amp, and that no speaker wires are crossed, or shorting out on the frame. if you have too many speakers hooked up, that can reduce the ohmage, and your not supposed to go below 2 ohms -per channel, or 4 ohms bridged mono.

Mar 13, 2011 | Pyle PLA2200 Car Audio Amplifier

1 Answer

Red light keeps flashing

While I cannot find any reference to the flashing red light in the manual, it sounds like the amp is going into a protection mode. I would check the following items:

-Make sure you have the power wires connected to the battery with sufficient size to supply the load. The amplifier is rated for a 30 amp draw, and is fused at 60 amps (2x 30 amp fuses in parallel). I would recommend at least 8 gauge wire as an absolute minimum..and ideally larger than that. To troubleshoot this, try hooking a battery (with fuses inline, of course) with heavy gauge wire directly to the amp. Does the problem go away? If so, the voltage drop due to wire being too small is likely your culprit.

-Make sure your connections are clean. Corrosion at any point can rob your amp of the power it needs for sharp punch and proper operation. Be sure to also check wires at any other connection point. This includes fuse blocks, crimp terminals and at the battery itself. Keep in mind that corrosion does not have to be visible to cause problems. Soldering connections rather than just crimping them (when practical) can help overcome this, as can sealing connections that are exposed to road dirt and grime under the hood.

-Check the impedance of your speakers, and how they are wired. The manual goes into great detail on page 2 about how to properly wire speakers, and what ohm rating each should have. If you are using two 4 ohm speakers wired in parallel on one channel, this is too low impedance for the amp. Either split each 4 ohm speaker onto its own channel or switch to 8 ohm speakers.

While you might check these and still have a problem, hopefully these will eliminate some sources of problems outside of the amplifier itself. Good luck!

Feb 10, 2010 | Pioneer GM-5200T Car Audio Amplifier

1 Answer

Kicker zx 1000.1 green light flickers and no sound

The first thing I would suggest is to check all connections to the amp and speakers, especially the ground. A loose ground can cause the problem listed. You can test this by temporarly running a ground from the amp to the battery neg. . If the amp fires up ok then that means your grounding point for the amp should be checked and cleaned and reattached firmly. If you have a meter(multitester) set it to ohms and check the impedances of the voice coils in the woofers. If one is cooked it may be shorted and tripping the amps protection. Always hook thing up with the sys off and then turn on and test.

Jul 21, 2009 | Kicker ZX10001 Car Audio Amplifier

1 Answer

Pioneer GM-7200M power problem

Check your GROUND wire might be touching something and making bad contact.

Jun 09, 2009 | Pioneer GM-7200M Car Audio Amplifier

2 Answers

Red Light

that means you probably have a shorted speaker wire, a bad speaker or the amp itself is bad, try disconnecting the speakers one at a time and see if it turns on or not. if the red light stays on with no speakers hooked up it means the amp is bad

May 30, 2009 | Kenwood KAC-7252 Car Audio Amplifier

1 Answer

Amp not working

Does it do the same thing if you remove the RCA input and disconnect the wires from the speaker terminals of the amp?

Oct 25, 2008 | Infinity Reference 7541a Car Audio...

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You need to check the DC voltage across the power and ground terminals of the amp. If the voltage drops below ~11v when the amp shuts off, you need to check the power/ground wiring and fuses.

If the voltage remains above 11 volts, you may have a problem with the load on the amp (incorrect ohm load, shorted speaker, shorted speaker wires...).

Jun 13, 2008 | Pioneer GM-X542 Car Audio Amplifier

3 Answers

Kenwood KAC-8103D 1000 watt issues

The speaker may have shorted and caused the output transistors in the amp to fail. This is fairly common. It can be repaired.

May 14, 2008 | Kenwood KAC-8103D Car Audio Amplifier

1 Answer

Amp not makeing any sound at all

I would suggest first to unplug it completely and plug only the power,ground, and remote and see if you get your beloved green light again.

If this indeed gives you the green light, it means that the amp is protecting itself from a short circuit caused by the speakers, check the speaker cables or the speakers themselves..

if this remains the same, it'll be internally in the amp's circuitry.. unfortunately, it'll be dificult to tell you exactly what failed in it.

Feb 18, 2008 | Car Amplifiers

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