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Amp does not work properly

Green light is on amp but amp does not hit the subwoofer like it should. but once I disconnect the ground for the amp with the vehicle running and put the ground back on the amp works fine. until I shut the car off and the amp doesn't work again

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  • Contributor
  • 41 Answers

I am just gonna though this one out there, could it be the voltage regulator in your altinater ?

Posted on May 05, 2014

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: VB101PK REV 13, AMP WITH SUBWOOFERS

you may have to much speaker for the amp or one of ur wires could be crossed

Posted on Mar 17, 2008

  • 233 Answers

SOURCE: green and red light are on my pyramid amp and its not working

It could be even simpler than that, yes an improper impedance rating on an amp will cause it to overheat, but should function temporarily until it reaches peak temp. If the outputs were blown the protect light should not light up being that they would need to work to cause the protect light to come on. I would double check all of your connections, one small little crossed wire would cause an amp to immediately go into a protect mode.

Posted on May 30, 2009

darkoh69
  • 77 Answers

SOURCE: Amp runs but then will just turn off and red light comes on

you may have fried the amp pre outs in the head deck, try the amps on another stereo

Posted on Jun 01, 2009

  • 105 Answers

SOURCE: Okay I've had the the alpine mrp-m500 amp for a

The Subs are probably blown . Take them to a shop to have them tested .

Posted on Jul 13, 2009

  • 26 Answers

SOURCE: Amp light on , but subwoofers stop working after 5 seconds

check sloder conection in amp. if your amp is in trunk it copuld have over heayed and mealted the metal.

Posted on Jul 13, 2009

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2 Answers

I have a kicker 500.2 red protection light is on and red light on top of amp flashes every couple seconds. Have checked all connections and other amp in truck works good. I bought two of these amps and...


Disconnect all the wires except the three main power wires, ground, 12v battery and remote. Now, turn on your radio, if the protect light is still on then there's an internal short in the amp. If the light turns green, then there's a short in either the auxiliary cables or the speaker outs. If it turns green, then troubleshoot the other wires that plug into the amp by connecting them one at a time until the protect light comes on, which will tell you that there's a problem with that speaker/aux wire.

Jul 25, 2011 | Kicker KX500.2 Car Audio Amplifier

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The Ground wire is hooked up right but the red light wont go off and stay green so the amp will work. It is very frusterating all the cables are the right size its is a 1000 watt amp. I have two 500 watt...


Sounds to me like the amp is going into protection mode. Try placing one sub on the amp with very little gain. One of the biggest reason why this happens is because the subwoofers are wired wrong. What is the brand and model number for your amp?

Apr 14, 2011 | Car Audio & Video

2 Answers

Car subwoofer makes deep bass when i hit the gas.


there could be 2 reasons why, first make sure your power and remote wire is ran down one side of the car, second make sure the rca jacks is on the opposite side of your alternator, make sure they are that way, this will work, if noise is still there, then you may need and inline noise suppressor. but you shouldn't

Feb 20, 2010 | Kicker 05C104 Car Subwoofer

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Amp is going out.


Have you tried replacing all of your fuses? If that does'nt work check your ground........ I would check all your connections also could be a connection shorting out causing your red light to come on.

May 10, 2009 | Car Audio & Video

1 Answer

No sounds coming out of subwoofers


CHECK INSIDE UR SUBWOOFER BOX ...

Apr 11, 2009 | Pyle PLAM2300 Car Amp

1 Answer

Sub cutting out


Check the 12v wire running from the battery to the amplifier. Also the sony explode is a garbage subwoofer compared to the Alpine.. sony (they say 1200w max but its more like 100w to power the thing) Amp could be going. Is the amplifier hot when running. If there is a burnt smell comming from the amp, its the amplifier

Mar 27, 2009 | Alpine Type-R SWR-1222D Car Subwoofer

1 Answer

Hi, I've just install an alpine power amp with JL 10inch subwoofer, everything seems to be working properly except for the subwoofer


If you have the RCA's running from the head unit to the amp, and the speaker wires running to the speakers then you have it hooked up right. Now If you still don't have any sound then you need to look at the amp to make sure that you have a green light. Still I would use 8 or 10 gauge power wire and then the same for the ground wire, make sure that you have a good ground.

Freakville03

Dec 21, 2008 | Alpine MRP-F250 Car Audio Amplifier

1 Answer

My amp in my truck is screwed up somehow when i hook up the sub it will start hitting at a constant rate of about twice a second and i am not sure what it is


Try disconnecting the RCA cables from the amp and see if this still happens. If it does, check to see that the constant (battery) and negative (chassis ground) are connected properly. If you have a poor ground for the amplifier, this may happen. If that is the case, then try and ground to a clean (bare metal) spot in the vehicle with as short a ground lead as possible.

Aug 11, 2008 | Car Audio & Video

1 Answer

Nitro BMW 484 roofers stopped playing


With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.


If the voltage remains near or above 12v, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

May 15, 2008 | Car Audio & Video

8 Answers

SUBWOOFER NOT WORKING?


if you have real old wires from the amp to the sub try getting new wires on it. check the little wires that go to the cone itself on the sub. sometimes they can manage to get pulled out of their terminals and make sure that thier touching the terminals on the correct spot

Sep 29, 2006 | JBL GT150 Car Subwoofer

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