Thanks guys for all your input! I had it out with the dealer today. I got my seats out and got the subs out easily. I tested each speaker. They sounded crisp and clear. Then went to two local car audio shops. They backed up my conclusion. Went back to the dealer sat the sub on the mans desk and demanded a real diagnosis. The amp is barely a year old! Its under a 2.5 year warranty. I think the dealers trying to avoid replacing it!