I live in England and Worthington is just up the road from me. I contacted them about repairs to any of the B&W speakers in the 800 matrix series, and they said "if your driver(s) go out, there are NO replacement drivers!" I even asked about after-market ones, maybe built in Mexico, and the resposne was: I hope not we make the only drivers for those speakers. Therefore, I reccomend anyone to take it easy on their B&W matrix speakers and subs. If anyone has experiemnted with new drivers, please let us all know how they sound. I am concerned because I have 801SII, ASW 800, 805s, DS6s, SCM8s, and FCM 8 speakers.