Auralex Gramma

Gramma description:

The GRAMMA Sound Isolation Riser is an incredibly effective device that's used to float an amp or loudspeaker and yields nearly total acoustic sound isolation, resulting in a purity of tone that has to be heard to be believed! The GRAMMA isolation platform comes complete with a carrying handle, road-ready carpet, Studiofoam Wedges (underneath), PlatFoam (underneath), and an optional GRAMMA Gigbag. 1-2 GRAMMAs will support most amps, speaker cabinets, theater subwoofers and monitors.

• Dimensions: 23 long x 15 wide x 2.75 high, inches
• Weight Limitations: Maximum load 300lbs