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Gig & Recording Amplifier & Monitor Modulation Attenuator. 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! GRAMMA 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; Weight Limitations 300lbs.
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