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I have a boss amp CX3500D and the red light just stay on and make my subs thumps

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Check the ground and check rca cords they somtimes do that make sure there are no hot wires touching hear try this pull the sca cords out off amp a little and see if if the light turns green if it does replace rca cords

Posted on Nov 30, 2009

  • Polaris4x499 Feb 18, 2011

    What if this don't work it just always stays on

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I had my boss 2400 watt 2 channel amp hooked up in my car. I had one sub on each channel and one of my subs blew. I unhooked the positive speaker wire on the blown sub, everything was fine. Driving down...


If your amp started smoking, probably not. Due to your description, did the other sub really blow? I would hook it up to another amp to test it. It may have been a channel in your amp. As for repairing the amp, the parts and labor to repair will probably cost you more that to just replace the amp.

Sep 06, 2011 | Boss Car Audio & Video

1 Answer

I NEED THE BOSS CX3500D SCHEMATIC CIRCUIT FOR ATTEMP REPAIR IT, TWO OF THE MOSFET WAS BURN IT,


hi i have one too with the same problem two transistors on the POWER side of the amp has exploded. to br sure of a durable fix u need to change all (6) on the same row... caus when they burned all the load as transfer to the remaining 4. not for long u will tell me, but thrust me its long enough to weaken them i have no diagram but the number on them u can easily found replacement one

Feb 28, 2011 | Boss AUDIO SYSTEMS CX3500D Car Audio...

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Pyle dryver amp light protection stays on not green light stays red i have tried to disconnect everything and plug it back up but light stays red


check your subs disconnect them the try to power the amp up if it powers up the the subs have died and it could be a problem with that amp i suggest you get a better amp

Jul 09, 2009 | Pyle Dryver PLAD213 Car Audio Amplifier

2 Answers

My subs don't bump to the beat, they just go THUMP THUMP THUMP...


It sounds like you need to ask for pro help mate, mybe the amp just needs setting properly, Is the amp on bypass for bass, or does the amp run the complete system

Jun 13, 2009 | Cadence TXA 750D High Power Mono Amplifier...

1 Answer

Red status Light


If the protection LED is lit, the amp is in protect mode and probably has shorted output transistors. To eliminate other possible causes, read through the following page:

Amp in Protect Mode - Trubleshooting

Let me know if you have any other questions.

Nov 07, 2008 | Boss AUDIO RIP-596 2-Channel Ripper Series...

1 Answer

Not producing sound


It sounds like the power supply may have failed. I'm not familiar with that particular Boss amp but many amplifiers will light the power indicator even though the amp isn't operating.

Have you checked your speakers to see if they're blown?

Have you checked the wiring to make sure the speakers are still connected to the amp?

Dec 19, 2007 | Car Audio & Video

3 Answers

Red LED "Protection Light is on" What is the problem


The red light means the amp is in protection mode. A few things can cause protection mode..... First disconnect the subs completely from the amp, and turn it on, if it powers up you have blown subs. Also try checking the main power wire at the battery...sometimes the current your meter is seeing is backfeeding from the remote wire, so your main power line could be blown at the fuse under the hood. hope this helps

Jul 17, 2007 | Crunch BlackMaxx BMX2250 2 Ch 1000W Amp...

1 Answer

Power light


This could be a DC offset condition. Check you manual for what this means. Or other condition. First Disconnect the Subs and try it. If it still goes red then disconnect the RCA's and try it again. If the Led continues to go red after the click then the Amp is hosed. The Click you hear is an internal relay that cuts the subs in after a dely so you do not get the turn on THUMP of the radio at your subs.

Jul 08, 2007 | Hifonics Titan TX 8805 Multi-Channel Amp...

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