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<blockquote data-quote="Deiimos" data-source="post: 8763863" data-attributes="member: 682903">Swap out the RCA cables and see if the problem goes away. Since it comes and goes it might be hard to troubleshoot, though it does sound like a signal input issue since the amp is otherwise functioning.Being the amp is older, the control pots and switches might be getting some oxidation on the contacts. Cleaning them may or may not help, but also not something everyone will be able to do. I’ve seen dirty gain / crossover controls cause issues with output level or stop some channels from working on multi-channel amps. Though I would think if movement is causing a change, it is less likely to be that unless the amp is really bouncing around.I personally would start with the RCA cables, simple, cheap, and if making a turn possibly caused it to start working again, RCA cable is certainly a place to start. Obviously I get that it might not be simple to swap them if you have to pull a bunch of trim panels, but it could be the issue. Maybe just put some RCA cables loosly from the head unit to amp so you don&#039;t have to do a ton of stuff for no reason. I don&#039;t know about Sundown, but some mono sub amps will have less output if one side of the RCA cables isn&#039;t working.</blockquote>

[QUOTE="Deiimos, post: 8763863, member: 682903"] Swap out the RCA cables and see if the problem goes away. Since it comes and goes it might be hard to troubleshoot, though it does sound like a signal input issue since the amp is otherwise functioning. Being the amp is older, the control pots and switches might be getting some oxidation on the contacts. Cleaning them may or may not help, but also not something everyone will be able to do. I’ve seen dirty gain / crossover controls cause issues with output level or stop some channels from working on multi-channel amps. Though I would think if movement is causing a change, it is less likely to be that unless the amp is really bouncing around. I personally would start with the RCA cables, simple, cheap, and if making a turn possibly caused it to start working again, RCA cable is certainly a place to start. Obviously I get that it might not be simple to swap them if you have to pull a bunch of trim panels, but it could be the issue. Maybe just put some RCA cables loosly from the head unit to amp so you don't have to do a ton of stuff for no reason. I don't know about Sundown, but some mono sub amps will have less output if one side of the RCA cables isn't working. [/QUOTE]

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