Can anybody help me out, Im wanting to fit a sub in my A3 but want to keep the standard head unit, purely because it looks right and matches the rest of the interior. It has the concert stereo with a baby sub in the boot already. How would i best go about this? Would i have to disconnect the sub that is already there, wouldi be able to use the wires that are already there for that sub and so on. Any help would be much appreciated, Thanks in advance.