I have an Alpine MRP-M850 that I've had for a while, only problem is the amp just recently has a high pitched squeal to it, sorta like an old CRT monitor, except not as annoying, the squealing is completely random and goes on for bursts of about a minute then stops for a while, its only noticeable with the music completely off.

I didn't want to post this ipn the classifieds because I'm not sure if I want to sell it yet.

I was thinking of putting it up for 100+ shipping..

Any ideas?

EDIT: Ahhh wrong section sorry!!