I've got a panasonic headunit and a kenwood 4 channel amp, crappy component speakers all around. The front two are on the first two channels of the amp, the second two are bridged into a single kicker 10" sub... rear speakers are run off of the headunit. The problem I have is this: I get an extremely high pitched whine from my front speakers that is very noticable, possibly just a slight bit from my rears. The whine increases in pitch with engine RPM. It is nonexistant when: A - the engine is off, or B - the headunit is muted. If I pull the rca cables from the amp, the respective speaker loses the whine along with (obviously) any other sound. The whine does not increase in volume with the headunit volume, it stays consistent, so if you turn it up enough it gets drowned out for the most part. However, it has gotten particularly bad with this new amp. It happened with my old amp, but not nearly this loud. The RCA cables are run separately from the power and ground wires. I don't know what else to do, or how to test this. Help me please, this is driving me nuts.