Awhile back I had an extreme amount of engine noise coming from my speakers. One of my friends asked me if I had the power wire to my amp running down the same side of the car as my RCAs. I was, so I ran them on opposite sides and it got rid of almost all of the noise. But, I still have some coming out of my 6x9's in my rear hatch cover. My next idea is the low quality of my power wire for my amp. It's not all that thick. I doubt that it's my RCAs because I made sure to get some good quality sets. I'm sure that some of you have had this same problem. Anybody have any answers for me?

check all the grounds...for your amp and cd player and capacitor if you have one etc.

make sure that any crimped or twisted wires are very well taped with electrical tap. or try getting a new deck because unless you have 5 volts or above (so i hear) the voltage of your current deck is not sending out a strong enough signal for your amp. so yea do those things. i used to have the same problem.. chances are its bare speaker wire getting close to each other or to the car.

Nice work on moving the power line from your RCA. I also heard if they do cross to have them perpinduclar to each other. As suggested check your ground even if you have to get to bare metal, scrape a little paint. Then check your gain, it might be turned up to high. If the gain is lowered to its lowest setting, do you still get noise? Another thing you could look at his filters. There are RCA filters and AMP power filters. I've also read somewhere that there are connectors which will increase the voltage coming out fo the deck, not sure how they work, but I'm sure they exisist. I'm having some "alternator whine" issues, I have ot have the gain set very low to avoid noise, otherwise if its set too high I'll hear the whine at low volume settings. I know what your going through its very frustrating.

Small piece on getting rid of engine noise

http://www.celica.net/faq/Audio_Electrical...Prevention.html