I'm getting a high pitched squeal when i turn the ignition onto accessories or start the engine. Did have alternator whine but this isn't that. I was told the RCA out's on the H/U may be no good. Took it back to where i bought it they said it bench tested ok. Is there a way i can check them myself as i've already bought all new wires and ran them all differently about a hundred, thousand times. Checked all the grounding wires and have changed these numerous times. When i turn the H/U off and just run the remote wire from the amp to the battery i still have the noise, does any one know what this means?