I know it was a long time ago.
But i have a 1999 Audi A6 C5 2.4 Quattro sedan.
I upgraded to the BOSE system. (All speakers, amp and subwoofer).
The head unit: JVC KD-X50BT
The wiring is made with my friend.
RCA to amp from head unit amp (cut the RCA end and install it into the...