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Protection light will not go off.

The red light comes on as soon as the amp is turned on. It stays on even when the speakers are un hooked. What could this mean?

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1 Answer

800a4 stays in protect mode


Generally thats a sign of a shorted output device, either a bipolar transistor or mosfet. Also ground faults can trigger a protect light.

Feb 03, 2013 | Rockford Fosgate Punch 800a4 Car Audio...

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The saftey red light keeps coming on


It means that the subwoofer is blown. The red light is called the Protect light. Disconnect the speaker wire from the amp and then turn the amp on and see if the red light goes away. But if as soon as you hook the speaker wires back to the amp and the red light turns on that DEFINATELY means the sub is blown.

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I have a rockford fosgate 501bd amp the protect light comes on when my deck turns on even with no speakers connected


un hook the subs and let the amp sit there on if the protect light shuts off you wired your subs wrong if it doesnt go off tun it off then back on with no sub music all the way down then slowly turn the music up if the light is off then comes on you need new rcas

May 03, 2009 | Rockford Fosgate Power 501BD Car Audio...

1 Answer

Power light turns from green to red protect mode and then there is no sound coming from my speakers


there are 2 reasons for it to be going into protect mode 1 is heat 2 is the load on it. if it is going into protect mode soon after it starts there is a problem with the speaker. if it is after it has been on for a while it is that the amp itself is overheating. hope this answers your question

Apr 27, 2009 | SPL Audio Phantom DK2-1000 Car Amp

1 Answer

Changed speakers and now red protect light stays on? why?


the sub might have a short or is blown or the ohms are different

Mar 30, 2009 | Crunch PZi1000.1 Car Audio Amplifier

1 Answer

Protection Light Comes on


Sounds like you have an ohm problem, Tryy hooking the positive from one speaker to the negative on the other speaker. Then hook the negative from the first speaker to the negative on your amp and the positive from the second to the positive on the amp this will drop your ohm load and the amp should stop going into protection.

Mar 08, 2009 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

Nitro 1000 w amp


unplug the speakers and the RCA leads from the amp, if the red protection light is still lit then its 1 of your linear amps blown or mosfet depending what your amp uses..if the red light does go off with the leads all disconnected, then connect 1 lead at a time and check the light,when you connect the bad lead or speaker then the light will come on and you know that 1 needs replacing..hope this helps

Jun 30, 2008 | Nitro BMW-481 Car Audio Amplifier

4 Answers

Red light


something is shorted in the circuit, or your subs. unhook the subs first and try it again, if it is still in protect then it is most likely the output transistors.

Feb 22, 2008 | Sony Xplod XM-554ZR Car Audio Amplifier

1 Answer

Concept CC-2502 Car Audio Amplifier


The amps are probably going into protection mode. The wires are most likely not hooked up correctly. Make sure you have a good ground, good power source, and the remote wire is run correctly. Also make sure the speaker output wires aren't touching each other, and you have the correct ohm load for the amp. What kind of speakers/subs are hooked up and how are they wired?

Sep 20, 2007 | Concept CC-2502 Car Audio Amplifier

1 Answer

Cordless phone, no power


Amps now have protection circuits on them now to protect them from blowing the electronics. Speakers dont usualy have any protection and can blow quite easy. Usualy when they blow they short out or short to ground and then the amp overheats and kicks off. What you can do is un hook both speakers and turn the power on if it stays on then plug each speaker back in one at a time. If it shuts off again without the speakers then it has to be somthing internal already damaged. Bass and volume are the #2 killers of systems. If when its up loud and the woofer speaker is moving in and out pretty far its on the edge of blowing.

Apr 14, 2006 | Creek 5350SE Amplifier

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