its premium bose system that comes in the sline models , i have a 2006 a3 sline , the previous owner had two subs in the back from what i was told, all the wiring is to the battery
Ive been happy with the premium bose system that came with my car but it doesent have enough bass, i dont know much about systems so i though i come here and ask haha i was pointed towards an 12' alpine typeR to begin with? im not trying to spend an shit ton of money though mayb 400 tops any help would be apreciated