love that set up.... and I would totally do something crazy like that if I won the lottery... Build it all underground in a concrete and steel bunker--wooo HOOO!
His web site is a good read... definately learned something about acoustics and transmission lines.
1 x Royal Device CUSTOM MADE Solid State amplifier. Power needed non more than 6 watt/ch at max pressure level before ceiling seems to fall. Easy frequency reproduction from 4 to 30 Hz with 24 dB slope at 30 Hz (passive cross).
never posted anything about it, because the dude has all sorts of threatening messages about using his pics without permission, and he obviously has more money than he knows what to do with for a lawyer