Auralex GRAMMA: Amp and Monitor Isolation Riser, Charcoal, Single

Get Cleaner Sound from Your Amps and Speakers The Auralex GRAMMA (Gig and Recording, Amp and Monitor, Modulation Attenuator) is an incredibly effective patented device that's used to float an amp or loudspeaker. The GRAMMA yields nearly total acoustic isolation, resulting in a purity of tone that has to be heard to be believed. When speakers or amps sit directly on the floor, they create structural vibrations that travel back through them. This can cause the output from the speaker to sound muddy and lack definition. View larger. Floating the more »