Question about Nitro BMW-481 Car Audio Amplifier

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I just put my amp back in my car after having it out for 5 months ( had to fix my car got hit head on) and when it turns on it goes str8 in to protecton mode( red light is on) not the green one.. any clue as to what maybe wrong? i moved to dif ground and still did work checked every thing over and all wireing is great it worked b4 i took it out just not now.. any way to reset the amp?

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  • Jeffrey Turcotte
    Jeffrey Turcotte Aug 14, 2017

    Have you checked ohms on speaker wires?



6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: was a green light during the day the next red and stays red

look for wires that are touching each other like speaker wires or you may have a blown sub

Posted on Mar 14, 2008

  • 631 Answers

SOURCE: My Amplifier keeps blowing fuses.

It probably has shorted output transistors.If it's like many of the Asian amplifiers, the outputs will be larger than the rest of the devices clamped to the heatsink. If you measure the resistance between the legs of any individual output transistor and read anything near 0 ohms, the transistor or one in parallel with it is likely shorted and will need to be replaced. You'd have to remove it from the board for definitive testing.

The donut is a power transformer. The coil with the black stick is an inductor.

The following page will help acquaint you with the components inside the amplifier.

Amplifier Repair Primer

Posted on Aug 15, 2008

  • 12 Answers

SOURCE: 481 doesn't work

did that to mine. Bat went dead and went to jump the car. What happends is when you attach the jumper cables, it surges the power to the amp. This gets worse with caps. I would say you blew the relay in the amp and needs to be replaced. It is worth fixin but youll have to send it off or take it to a repair shop to have the new relay put in

Posted on Oct 23, 2008

  • 113 Answers

SOURCE: I have a Nitro BMW-483 AMP

if you still get sound it just might be the led

Posted on Jul 05, 2009

  • 37 Answers

SOURCE: I have a nitro 2000w amp and the protection mode

could be blown fuse could be shorted output or to much a load bad ground bad signal or damaged amplifier take it to a professionall installation facility to many things from that description could be the problem

Posted on Mar 17, 2010

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