Need JBL woofer number

[LE15-Thumper]

I saw the cinema article that describes the 4645C subwoofer.
What driver(s) does it use ? Anybody have the plans ?
It goes down to 18hz !

[4313B]

It's the 2242H/HPL and it's also used in the Synthesis S1S subwoofer.

http://audioheritage.csdco.com/vbulletin/showthread.php?s=&threadid=1690