Hi to all, i have an a3 8p tdi s line 170 and wish to upgrade the speakers. i have the non bose system with the concert h.u which i have to say i quite like. what i have already bought and wish to now install is rainbow comp speakers upfront and a pioneer sub in the boot. the sub is an enclosed sub with amp built in - forget the name but it is the one thats super thin and non scratch/space saving thingy. what i would like to ask is anybody's advice or pointers on installing this equipment. can i use exsiting speaker wire? is there already the wiring in the boot from the oem sub? any tips before i make silly mistakes. cheers, chris. - oh by the way i have searched high and low on this forum and havent found to much info, before some of ya slate me for being lazy- lol.