CELESTION SL6 Si - woofer replacement/repair

Yes - they really are great speakers, though not my primary ones at this point. I think you're right about having to keep my eye out for an old set for sale to cannibalize. I suppose it's not too far-fetched to imagine someone ending up with just one speaker for some reason and looking to unload that. But I probably shouldn't hold my breath.

I didn't really think you would find one speaker, I was talking about buying a pair. They come up cheap enough to make it worthwhile if you really like them.
They aren't my primary speakers either, but they just have really great balance of performance virtues that makes music sound good, and makes you forget what they can't do.

You might be able to find someone to re-cone speakers with butyl surrounds. (Re-coning doesn't necessarily have to mean replacing the cone assembly-it can involve voice-coils and surrounds also).
I'm no chemist but I've noticed some white residue that seems to build up with these butyl rubber surrounds. I've been wiping it off with a damp cloth, and following that with an Armor-all treatment. And crossing my fingers. BUT, I believe that Armor-all has silicone, so keep it away from the woodwork,it can make refinishing very difficult (fisheyes lacquer) also could make touch-ups tricky too.

Give Bill Legall from Millersound a call to get his opinion on this situation;he is well known in the business and highly respected for his work.

Millersound
1422 Taylor Road
Lansdale, PA 19446-1531
(215) 412-7700