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My amp gets really hot as soon as the power comes on. what does that mean

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If the amp works ok then i would suspect a misadjusted class A/B bias adjustment ,,or more likely miswired speakers

in your case the amp might be a "bridge" output stage ... (two amps driving each speaker from both sides .. if one of those outputs is shorted to ground (as if the speakers are grounded share a wire then things will get hot .. each speaker must be on its own in these systems .. try disconnecting all speakers and see if it still gets hot ..

Posted on Jul 22, 2009

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Check your speaker output cable and connector, they might have connected to body of car.

  1. Remove all input / output cable from amp
  2. Plug the power into amp.
  3. if still the amp is still heating.
  4. Check if any screw used to fix is not connected any part of the amp output or input point.

Posted on Jul 22, 2009


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Amp getting really hot

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Sherwood Amplfier

Sounds like you like your music like me... LOUD. If you've done this a number of times, there are a few things that can happen:

1. You've blown the speakers... but you've said it operates for 2 seconds, then cuts out.
2. You've damaged the amplifier modules within the amp and they immediately overheat upon power-up. Does the music come back like 5 or 10 seconds after the unit cuts out?
3. Thermal switch has malfunctioned and just cuts off the power to the amplifier modules as soon as it sees any heat.
4. If you've gotten the amp really HOT during playing, it's possible that it's as simple as the amp modules are only intermittently connected (fatigued/stressed or cold solder joints) at the on the PCB. Just resolder the connections of the amp module to the PCB. I've seen that happen numerous times and that's where I'd place my money.

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