We recently had a customer who purchased a clean Saab but needed an audio upgrade. He purchased the Rockford Fosgate Punch series components up front and 6 X 9's in the rear. We got the speakers in no problem but the signal from his factory radio and amplifier just wasn't enough to really drive the Rockfords.
Since this car was a Saab nobody made an aftermarket kit for a radio replacement. On top of that the car has fiber optic network which the radio is a part of. We were able to solve both problems. We removed the circuit board from the factory radio and found a place for it behind the dash. This kept all the OEM electrical systems working. We then build a new dash pice out of acrylic and finished it to match the dash color. It turned out better than expected.