Is the Butt Kicker an option for us XBox flyers or is this stuff strictly in the realm of the PC setup??
I can now answer my own question - YES it most certainly does work on X-Box, no software of course so it only uses the audio frequencies but in the Spitfire it certainly adds a little Merlin engine reality 
I got the ButtKicker Gamer 2 - its an older model now but the price was excellent and asking tech support it seems to be almost identical in effect to the newer replacement.