Auralex GreatGRAMMA v2 Amp Isolation Platform

The standard GRAMMA platform runs out of room under a full-size cabinet, and GreatGRAMMA v2 is the answer: almost 30 percent larger, sized to float 4x12 guitar cabinets and 15 in or 18 in bass and PA enclosures instead of just combo amps. It uses the same decoupling principle as the rest of the GRAMMA line to keep cabinet resonance out of the floor.

That means the same payoff at a bigger scale: a tighter, more focused low end and a truer read on the cabinet's actual sound, on stage or in the studio, rated to carry up to 300 lbs.