I was going to PM Danny about this, but thought I'd throw it out to everybody, in case anyone else has anything to say on the subject.
I've been spreading the word in other Forums (especially Audiogon, but also some dedicated to planar loudspeakers) about the OB/Dipole Sub, and have been contacted by a few people wanting to hear about it. I tell them about the sub, and direct them to the GR Research website. But they get lost looking for info about it on the site, as the OB/Dipole Sub is not listed as a complete product, info on it found only on the pages of the 12" and 8" drivers themselves. Danny, you list and picture the OB woofers and the A370 plate amp, but not together as a subwoofer kit. Rythmik lists the OB Sub as a complete DIY product, but doesn't have all the design and technical info potential buyers are looking for, and Brian and Enrico aren't really pushing the sub, understandably directing customers to the Rythmik subs instead.
Just a suggestion, but I think it would be a good idea to list and picture the OB/Dipole Sub as a complete ready-to-buy kit, like the other GR Research OB Series DIY Kit products.