First off here is what I have and the problem:
Head unit: the NON-Rockford deck with the 6 CD changer
Problem: I just installed the Harman/Kardon Drive + Play. Everything went together without any problems (installation is very straightforward), but the sound quality is HORRIBLE. I would say it is the equivalent to using an FM transmitter (no bass, weak overall power)
Connecting the iPod directly to the Aux-Input with a 3.5mm cable was MUCH better.
Essentially using the Drive + Play is the same as connecting it direct to the Aux Input - but now it is going into the "brain" of the Harman/Kardon unit before it is exported to the speakers. I just took the Aux-Input plug from the faceplate, unscrewed it from the faceplate, pulled it inside and connected it that way (there was no other option other than FM transmitter).
BUT, I have been talking to RonMartin27 - he said his sounds great - even better than the CD or radio, by far. BUT, he has the Rockford head unit.
Problem is, Ron isn't sure how his is connected (I KNOW it is different than the way I described above though). My question is, does the Rockford deck have an interface in the back for an external CD changer? If so, his is likely connected through an adapter cable, which is possibly how he is getting much better audio quality.
But maybe my unit is defective?
I have an Alpine deck that I can install which has the ability to connect the iPod through the CD changer interface....BUT I don't want to waste my time with that, if the device is defective.
I thought I'd come on here first to find out if the Rockford deck has the CD changer connection in the back- that might be my answer.