I'm about ready to get a set of Polk MMC6500's for the front door/front tweater in my volvo, and move the DB 650's to the rear doors, replacing stocks. My question is the with the depth of the speakers. The 650's were 2" deep, and a bit difficult to fit. The 6500's are 2 1/2". I'm also concerned with magnet width, the 6500's are 3.717", and the 650's arent listed, so I'd have to do it myself. If noone has any insight, I guess Ill just take the speakers out, measure, and put them back in, but any advice from someone knowing more about car audio is appreciated.