Have a pair of B&W DM 601's (1st series) that I use for rears. One of the speakers is staticy on low frequency sounds (tweeter is fine). At times sound doesn't even come through only light static on the low's. I'm not a speaker repair expert, but I was wondering if this symptom is typical of some particular well-known problem that would be easy to remedy, or is it more complicated than that? I switched the rears and wired them with single and with bi-wires, still the same so I'm pretty sure it's the speaker and not my sources/connections. Also, if I need to take it in, can most repair places deal with this or should I stick to B&W authorized repair shops (if there are any). Thanks.