Hello. I have a 1993 MX-6. Only 94,000 KM'S on it. Beautifal condition HOWEVER, I have put in a CD deck. That's about it. It belonged to my Uncle. I have noticed that when listening to some of my CD's. (Hendrix, Fight Club ST) there is a huge crackle coming from the back. Now, it's NOT the speakers however...it sounds like the plastic back hitting the glass when it is somewhat loud. I don't wanna fill in all the gaps with glue or rubber cement but, how can I stop this annoying sound? And remember that the speakers are fine, it's just that when the volume is up, there are sounds comin' from the back. PLEASE give me some idea's on how to fix this! Thank you!