hi hoping someone here can help me solve this. I recently bought a little project 8l tdi. Friend of mine had his a3 quattro stolen and offered to give me his head unit and speakers. He has the bose concert system I have the concert but not sure if it’s bose or not. Long story short I switched the head unit only to see if it would work and everything seems fine except that I’ve lost the front left door speaker. Other than this the sub is working rears are fine I just cannot figure out why that speaker has stopped working. Was fine before the head unit swap. Is it a case of swapping out all of his speakers for mine, to solve or is there another option? Appreciate any help
