IMF speakers and KEF B139 woofers

Richard (Vantageaudio) - thanks for your quick reponse. I believe the speakers were overdriven (not by me, by someone who was house-sitting for me). On one of the woofers, the voice coil is out of alignment, and at high (not excessively high) volumes, on certain low frequency notes (on some recordings), it can be heard rubbing against the magnet - rather ugly sounds, not musical at all!! I would like to replace both woofers if I can, but only one if that is all that can be foind. By the way, do you also get other replacement drivers for these speakers, such as midrange (KEF B110), and tweeters and supertweeters ?
thanks for your reply. Matt Bonn (MABonn@aol.com)

Pls1 - Thanks for your suggestion about replacing the capacitors in the x-over. Do you know where I can get information on the capacitor values and recommended brands to use ? Thanks, MABonn@aol.com