I have a JBL 2241H here, that I'm trying to sort of build a "frankenwoofer" from. Got someone who wants a woofer with the response of a 2245, but with the power handling of a 2241.

We got the frame without a kit in it- problem is, no matter what kit I put in it (even one with the correct factory 2241 voice coil), I get a BL product that's about 2/3 of normal (between 12 and 13, where it should be between 19 and 20). I can understand other parameters being different (different cone weight, different suspension stiffness and such)- but the BL product should be a function of the magnetic gap strength and the coil winding geometry, and nothing else.

Has anyone see one of these ceramic magnet vented gap woofers degauss? I would assume they could be re-gaussed... but I just have never seen a CERAMIC magnet JBL do this before...

Regards,
Gordon.