I bought one with the paper cone several years ago to experiment with. I liked it. I also got it in a piano ebony finish- not sure if that was a normal option. So I bought a pair of the 15 inch units- also ebony piano finish- those don't have a paper cone- for my main system. I use them with a small DSP controller just for very low bass 55hz down with a 24 db/octave roll off. They work great. The 12 now serves yeoman's duty in a small home theatre set up in our front lounge and is fine. Brian is a nice guy and even came to visit since I now live in Austin. Good company. Good product. Good value.
In the main system, the sub system runs in parallel to the main system from a line output off the line stage- nothing is in the middle of the main system, electronically- power amps (SETs from Lamm) directly to mid-horns with no Xover. Wasn't terribly hard to dial in either with the continuous phase control.