Evening everyone, first post here! I've got an A3 (8P) and have opted for the the Bose upgrade, ive already changed the Headunit for bluetooth handsfree model, now i'm looking to add a bit more bass to the system, in the form of a decent sub. Question is, does the Bose upgrade on the 8P come with a sub in the back quarter like the 8L did? If so, how do i go about disconnecting it? Also another slight annoyance with my new headunit, i'm getting a lot of electrical interferance when the lights/indicators are used, which generally gets louder, the faster the engine revs. Does the standard Bose headunit have a heavy duty supressor or something?