I have a KX800.2 and two CVR10s that are set on 4om. My bass boost,and gain knobs are loose. When I try to adjust the settings my sub moves in and out violently. I also have a problem getting the two subs to run stable.
Try getting some elctronic contact cleaner and then spray it into the controls and work it in for a few minutes on each control. Do this with the amplifier off, and after you have done this you can cheeck to see if it helps. If it does not help, you may have some broken solder connections on the controls where they connect to the board. That is something that would need to be checked by a service center and if that is the only problem it can be repaired for a very reasonable price, depending on the rates of the service center. If it is anything more than that, you may want to consider just replacing the amplifier, but that is something to determain after you find out exactly what the problem is.
There is just no way to know exactly what the problem is without being able to test the amp myself, but the advice given would at least be something you can do yourself and possibly fix your problem with spending too much money.
let me know if I can help you any more, I have been repairing car and home audio equipment for almost 18 years and have seen just about everything at one time or another.
Good luck,
Dave
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