Unlike some past "SPL" woofers -- there is nothing about this sub that makes it incapable of music reproduction. It doesn't HAVE TO come with a concrete spider (MTX RFL), it doesn't run a crazy tight gap (RFL good example again), it has a decent level of excursion, heck I even have a shorting ring in there to keep inductive distortion down. It can also be mated up to our big frames, mega-roll cones, etc if the customer wants it.
What it will have is a VERY low Qts -- which can cause a saddle shaped response. Obviously a bunch of folks don't care about that -- as many run DDZ woofers daily, or other super low Qts drivers (old TC-5200 series were very low too).
As far as the specs -- I will release them once it's built up. This one may or may not be the FINAL design but anyone who follows me knows I share alot of info //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I won't be able to share specs for every possible configuration, naturally, but I'll at least post up several configurations as we build them.