Quick question peeps, I have an S3 fitted with Concert HU and 6 cd changer in boot. The sound from the Radio and tape is fine and is as good as you'd expect from a factory system. I have Bass set to +2 or 3 and it handles it fine. If i then select CD, the speakers vibrate as if they have tears in them all. /ubbthreads/images/graemlins/noidea.gif The sound sometimes goes off for a few seconds too. I have to set the bass at -3 or 4 to get some sense out of it, but then it sounds like a kitchen radio. I've checked all the leads and connections, but no better. I reckon it could be a new changer. Any ideas anyone???