The Auralex Great GRAMMA (Gig and Recording, Amp and Monitor, Modulation Attenuator) Speaker Isolation Riser is incredibly effective at floating an amp or loudspeaker for acoustic isolation.

Great GRAMMA yields nearly total acoustic isolation, resulting in a purity of tone that has to be heard to be believed and it is almost 30% bigger than Auralex GRAMMA so it can float large speaker cabinets.

Now 4x12s, 15" or 18" speaker cabinets can benefit from the awesome acoustic properties of Great GRAMMA.

Auralex equips the Great GRAMMA Speaker Isolation Riser with a carrying handle, road-ready carpet, with Studiofoam Wedges and PlatFoam underneath.