just bought an '06 SL as well. One question for you, are the rear speakers behind the backseat the subwoofers? I had someone in the car the other day and they were telling me that the rear speakers arent working but u can feel the bass when ur hand is over the speaker. Thanks for the help.>>>>>>>>>>>hey i saw this coomment by you in one of th threads ,actually iam also facing the exact same problem right nowwith my 04 iase,did you find out whats wrong with the back speakers or subs ,please do let me know if you found out and the fix,thanks fo help!!