Originally Posted by lbraasch

it's not hard. you just have to understand how these things work. they're a lot like bmw stereos...

head unit is just the reciever. amp is in the trunk. meaning... you already have a preamp out coming from the deck to the trunk. - need line level output for amps - check

all speakers in a bose system are 2 ohms. so, i fyou want to change all your speakers, you'll have to run a different amp, or lose a lot of power, b/c you'll only draw aprox. 50% of the wattage w/ 4ohm speakers (and most are 8ohms anyways). running a new amp also requires running new speaker wires. takes patience, but also not an incredible feat.

amp's require a power cable. tap the battery. nothing new. a lot of people go through the grommit where the fues box is on the driver side. peep audiworld tech articles for help... - amp power - check.

amps require remote turn on. since audi already has it's own amp, you can borrow the remote turnon signal, thus, you have your remote wire - remote wire - check.

amps require ground. ground it to the trunk. - amp gorund - check.

so we have pre-amp out, remote power, actual power, ground, and speaker wire. what's left? nothing. it's not hard, it just is a little different than the jap import cars.