Leeladisky

All - I have a 2007 S6 with Bose and I want to add another sub....what is the best route/method to grt power to the trunk and where did you tap for the crossover? Anyone done this???

Eric5412

The power is already in the trunk under the removable panel on the passenger side. For the audio I just tapped the wires for the factory sub(the amp is on the driver's side of trunk).

Let me try to save you some trouble- It's not going to sound good/right. I tried different subs, box type and amps and it always sounded better without it. I think it's a phase problem when you run different size speakers in different locations playing the same frequencies. Unless you're going to change the whole system, just adding a sub is not going to sound good.

DirtyVegasTT

I finally gave up messing with german cars' sound systems. It was a headache to get everything to work only in the end to regret it and pull it out. I too found that the subs alone did not do much for the sound system and only made it off-balance.

danswa

I actually just got finished adding subs to my 2008 S6.

I'll take some pictures for you if interested.

I put in 2 x JL Audio 10W6 Subs and a JL Audio HD750/1 and a CAP.

Looks and sounds excellent (and doesn't even use hardly and of my trunk -- that was a requirement for me), my installer is very experienced and knows how to balance things out fairly well. He did tap into the factory sub output.