Fuzz: BoredSys didn't say it "was" boring, neither did I, he stated it "sounds" boring.
After reading the "how it works" section for the third time, I read it once before I posted the question, the part I still don't quite have a grasp on is the signal. I assume the binding posts are for input, would this be correct? The sound is not amplified through an amp, the blade pitch increases, moving more air, increasing amplitude, sound right? Now they state the blades remain at a constant speed, so if blade pitch increases amplitude, what changes in order to achieve the desired freq? Is it the pitch as well?
I have always said that smaller drivers hit harder and provide cleaner bass, but can't go as low (single driver vs. single driver) as a large sub. Not being a subwoofer guru, that is probably skewed. Just my experience. I see your point on acting as one driver.
I've heard a couple car subs that go so low you can't hear the bass, but it rattles windows for blocks. It's that kind of ultra low bass I'm looking for. Butt kickers are not an option, they seem like cheap theatrics to me. If you've ever been driving with a child in the back seat whose feet can reach your seat, that's how I look at the butt kickers. JMO.
The direction I would like to go, is having a couple smaller subs for 2 channel listening, that can be blended in to compliment my towers. Then add a third possibly much larger sub for really going low on movie night. Now Paradigm got to 7hz with multiple, here meaning six, drivers. I think $6000 is a little out of my price range. Power sound used 3 15s and is half the price. 2 10's or 12's for music at around $1600 for the pair seems reasonable. That leaves me $1400 for a single sub to go really low. Now integrating all of this and getting it to sound right, for me, might be a trick. I've looked around a little at DIY, which I'm not afraid to do, just not sure which drivers and design I should go with to achieve the afformentioned result. Is there a better solution to achieving what I'm after?