My friend gave me this amp because it dident work, every time it would come on it would go in to protect mode. I took it apart a found one set of the output transistors where blown and the gain pot was broken, so I replaced all of that and hooked it up and it worked, but now as soon as its turns on one side of the amp starts to heat up and it gets realy hot. I thalt that mabe since I replaced one side of the output transistors, mabe the other side may have been going bad and heating up, so I replaced that side as well, but that still dident fix it. Any help would be great. Thanks alot!
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There are really only two possibilities here. If you have the gain turned up too high then your amp will get over worked and will go into protect mode. It is a safety feature. You should never really have the gain at much over 50% up. If you have to consistently run it higher than that you are overworking your amp and it will either shut down to protect itself or you will fry it.
If it goes into protect mode with no speaker wires connected to the amp, it sounds like the audio output transistors have shorted. If that's the case, they would have to be replaced. It would require troubleshooting to find the shorted parts. You'd then have to disassemble the amp, desolder the defective parts and install the new parts. The following page provides the basic information needed to repair the amp.