John P. (TT 225)

My S5 arrives within the next week, and I will probably replace the Bang & Olufsen sub with an aftermarket one and amp.

My car won't have nav, so I don't have the MOST fiberoptic hurdle that others have. In other words, cars equipped like mine would seem to have standard, low-level analog signal coming from the receiver that can be tapped to provide signal for an aftermarket amp. This is a much better approach than tapping the speaker (high-level) wires because those have already been filtered (I have to imagine the range they're sending the B&O "sub" is high-passed at 50hz or something, and low-passed really high) and are noisy.

If anyone has access to a Bentley repair manual, I would REALLY appreciate any information it gives about the wires coming out of the receiver and going to the Bang & Olufsen amp in the trunk.

Please, please, please!

John P. (TT 225)

Car's here, and I would really appreciate the help if someone has the repair manual!

BUMP!

PARealtor

this may sound obvious but have you tried a Bentley forum?

John P. (TT 225)

Bentley publishers makes the CD repair manual for Audis and other cars.

bl0rq

Did you ever find the diagram for this? If not, what was the final solution?

John P. (TT 225)

Sure did. Was able to tap into the low-level outs from the head unit before the amp. Nice, full signal!

Got this and all the info I will ever need from the Audi ErWin site.