[quote name='stevie' post='942810' date='Sep 1 2010, 06:16 PM']If you think you are overpowering the bottom end of your existing cabinet (which might explain the damaged driver), it could be that you need another cabinet to support the bottom end when you are playing at volume.[/quote]
Thanks for the suggestion. I'm using a shuttlemax, which produces 600W into 4 ohms, which is how the two celestions are wired. So it's 600W RMS into a 600W RMS cabinet. I suppose by some people's thinking, it might actually be underpowered, yes? But the shuttlemax has a little clip light that comes on, and I believe it has a kind of peak-limiting compression that kicks in, rather than just clipping the signal. And I just about never let that light come on, anyway -- I just don't play that loud. So it's a little mysterious and disappointing that it would be damaged.
But I think perhaps Bill Fitz has put his finger on the low end issue -- the BN10-300x speakers have their resonant peak Fs around 64Hz. So by the time they get down to low E (around 40Hz), it's rolling off, and the by the time they get to low B (closer to 30), it's really weak.
I was actually looking at the Eminence Legend BP102 -- they have a really low Fs (35Hz), high xMax, but a little less power handling, a little heavier, but MUCH cheaper... two of them would cost the same as one Celestion, if I could even locate one...