[roadracer311]

I think there are only two choices with the CDR23. Rip out everything and start over, or go with the Dension. Might be able to get away with keeping the original speakers. I've got the Bose audio system, so the impedance of the Bose speakers isn't the same as normal speakers. Car speakers are normally 4 ohms and the Bose speakers are 2 ohms, I believe. Not sure about the non-Bose speakers. I don't think it's worth doing a head unit and amp without changing the speakers though.

I'm fairly happy with the Dension. Has worked well for 3 years. Did have to bring the car to the dealer to have them activate the "CD changer" since the Dension mimics a Porsche CD changer. The dealer had no idea what to do, but it just ended up working after they tried several things and gave up, lucky for me.