I have a 2003 R53 with the stock non-HK head unit and aftermarket (Infinity) speakers. I would like to improve the sound quality. Has anyone added the HK system (amp, speakers, etc)? I see lots of posts of people moving from HK to aftermarket, but I would like to stick to OEM.

 

Head unit is the same on the HK. The wiring would be a nightmare (all goes from HU to amp in back, and then out to speakers.

 

Thanks. You are right about the wiring. It will be an good winter project.