NHT NPT-11-125-1: Is this the B-10 subwoofer driver?

This popped up on eBay and I thought "what the heck, it has to be better than the ARW 250 woofers I bought years ago".

I checked the NHT closeout sale list and unfortunately this driver wasn't listed there, so I got nothing on this right now. Anybody know anything about the driver? TS parameters, where NHT actually used it, who made it, anything?

Thanks