Auralex GRAMMA ? Anyone got one?

[Robert1986]

I am in need of something like this to boost my subs performance. Seems like a solid peice of equipment but I'd like to hear some user feedback.

http://www.auralex.com/sound_isolati...ion_gramma.asp

The GRAMMA (Gig and Recording, Amp and Monitor, Modulation Attenuator) is an incredibly effective patented device that's used to float an amp or loudspeaker.

GRAMMA yields nearly total acoustic isolation, resulting in a purity of tone that has to be heard to be believed!