I recently installed a car audio system and since have been battling annoying noises. I have a pioneer headunit and from what I've read they are susceptible to noise via RCA cables. I have tried everything and can get it sounding great if I install the ground loop isolator directly into the 4 channel amplifier. Only problem is, that situation forces me too put the isolator on "backwards". Meaning the male RCA's that say "TO CD PLAYER" must be plugged into the amp and the female RCA's that say "TO AMP" are connect with the main RCA cable going to the cd player. Everything seems to work but I'm worried I may be sacrificing sound quality or even worse potentially damaging my audio equipment. I've tried hooking it up cd player-side but it picks up noise from lots of random stuff in my dash. Any insight would be greatly appreciated. Thanks.
As stated previously, running isolating your power down one side of the car and RCA's on the other may help. Running the ground wire of your deck to your amp since the factory may be grounded with many other items. I would not suggest running a ground from the battery as this is usually a certain in ground noise, as well as more resistance in your amps power circuit. Ground noise can also be a nature of the beast with some amps.
Last but not least, some of the better RCA interconnects have are better shielded and have a drain lead that can be grounded. Ground loop isolators are a last resort and not normally commonly used.
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