Shop/Auralex/Instant Sound Optimizers/Isolation Risers/Gramma
Dimensions:23″ long x 15″ wide x 2.75″ high
Weight Limit: 300lbs.
The GRAMMA (Gig and Recording, Amp and Monitor, Modulation Attenuator) is an incredibly effective patented device that’s used to float a loudspeaker or subwoofer.
GRAMMA yields nearly total acoustic isolation, resulting in a purity of tone that has to be heard to be believed!