Question about JVC KS-AX5500 Car Audio Amplifier

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Protect light my protect is red when there is only power, ground, and remote connected to it.

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The most common cause fir this is blown (shorted) output transistors.

Posted on Nov 12, 2007

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2 Answers

Tc 8001 red light


on some amps there is a duel light. red and green usually. red means it is in protect mode or you didn't hook up your remote wire. if in protect mode, it could mean a number of things. did you hook it up with speakers and everything?

Mar 01, 2012 | MTX Thunder® TC8001 Car Amp

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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

2 Answers

The red protect light is coming on


It is possible that your amp is going over the threshold limit of draining current to give out the protect signal. What could be done is to first checkout if your speakers are loading the amplifier, check the rating of the speakers and the impedance, must not be too low.below 2 ohms. Now check the source signal if this is bringing in any transcient signals to power out the outputs particularily high/low freq. So decrease off your bass and treble to mid position and test again. see if there is any improvement, if so there could be a filter problem with your set. Connect an external source and see if the amp powers better , in such case check for fault in cables, input lines and ground with in the set. Repeat this and check. Hope this helps you out. Good day

Jul 19, 2010 | Verge VGA285 Car Audio Amplifier

1 Answer

Havin problem with a1200 class a/b amp it ligts green and red at same time after hooking in remote how doi fixdo i need diagram to fix


Make sure you don't have any shorts on your speaker wires or rca cables. Unplug one at a time, the turn on power until it stays green with no protect light, then you know what input is causing the short. If you remove all speaker wires and rca wires and all you have connected is the ground, power(12volts) and remote and it still lights up red/green(in protect mode) then your problem is the amp.

Mar 09, 2010 | Car Audio & Video

1 Answer

!!!red protect light is on!!!


Hello beaugarcia26,

Unless the amp itself is defective, there's a short or ground somewhere.

First disconnect the speaker wires and RCA (or high level) inputs, leaving just ground, remote turn-on and power leads connected. Then see if the amp powers up normally. If it doesn't check the ground with a multimeter and make sure it is good. If the amp powers up normally, check the speaker, speaker wires and inputs for shorts or grounds.

Hope this helps.

Sep 02, 2009 | Hifonics Brutus BX 1205D Car Audio...

2 Answers

Amp light is neither green or red


have u connectted the remote wire from head unit to turn amp on? have u got + and - the rite way round.hope this of use.

Mar 05, 2009 | Power Acoustik PS2-1250 Car Audio...

2 Answers

My amp stays in protection mode


Does it go into protect in the vehicle if you disconnect the speaker wires from the speaker terminals of the amp?


Nov 29, 2008 | Sony XM-2002GTR Car Audio Amplifier

1 Answer

Legacy 1470 smoke prob.


If it begins to smoke with only the B+, ground and remote connected, the power supply transistors have likely failed.

The protection light generally won't come on if the power supply is blown because the supply must be working for the protection circuit (which protects the output transistors) to engage.

The power light may be connected to the B+ side of the power supply. If that's the case, the power light will illuminate even if the amp is inoperative.

Let me know if you have any other questions.

Aug 27, 2008 | Legacy 4CH 1000W RED AMP Car Audio...

1 Answer

Lightning audio B300.4 amp protect light


The most likely reason for it to go into protect is shorted output transistors.

Jan 16, 2008 | Car Audio & Video

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