drivers FI 18 or Mach 5 18.4

[jaytx]

I have everything but the drivers. I am trying to decide betwen the FI IB18's and the Mach 5 18.4's, 4 of 'em. Smallish room 15x13 upstairs treated with movie theater velvet on the walls, backing up to large attic space where I intend to mount the manifold with opening(s) beneath screen. I used to be in car audio, so bulding the manifold is no problem. This is a very "dead" room accoustically due to fabricd walls and heavy carpeting. I want enough displacement to recreate the Big Bang in the room, thereby merging quantum mechanics and audiophillia, and confusing the bejeebers out of Stephen hawking.
Tex

The List:
2 Outlaw Receivers, 1 used to biamp
Crown XTI 4000
BFD
Denon Upscaling DVD
Sony Blue Ray
VMPS Large Sub (soon to relocate)
Pair Klipsch Cornwalls front
Pair Klipsch Sinergy 2's rear
Klipsch center
cool stull not using
Nakamichi auto reverse deck (remember these)
B&O Vertical Turntable
Carver Sonic Hologram generator (handwritten manual by Bob C)
Yahama DSP-1

[ThomasW]

Fi is lower cost and has more Xmax. That said the room is small enough either driver will be fine.