Ok this is the weirdest problem I have ever had with any install.

Just installed my clarion 12 in my pickup and even without the truck running I have a lot of noise coming from the sub like some kind of interference from something. I've only ever had noise problems with different installs from the engine running like alternator whine and such.

It is a constant buzzing sound. And when I play a cd it picks up even more noise just from the disc spinning in the player. I have triple checked all my connections and grounds especially. Have tried a couple different pairs of rca jacks with no reduction in this buzzing noise. I am only running the one phoenix gold sub amp and my mids are powered off the deck.

I'm beginning to think there is something wrong with the deck because when I open the faceplate like I was going to eject the cd once the plate drops and the lcd display goes out all the buzzing noise stops. But as soon as I push the faceplate back into display mode again the buzzing starts again. My deck is a Pioneer DEH-P490IB. It's only a couple of months old.

Any ideas?