FIXED: so my friend sat in my car and i asked him where he thinks the rattle is coming from. he was sure that it came from both speakers. we purchased a pair of pioneer speakers from bestbuy. when we took off the stock speakers, they looked pretty bad, no wonder the sound quality was so bad before. now it's all good after the new speakers!

when i turn the stereo on, either playing the radio or through the grom aux kit i just installed recently i hear a crazy rattle coming from behind the dash somewhere. it does it most of the times even when the car is stationary. anyone know if there is a fix for this and where exactly it could have come from? i have a 2002 oem system without the harmon kardon. nothing has been modified except for the aux input.