Auralex Acoustics SubDude-HT Subwoofer Acoustic Isolation Platform, 1.75" x 22" x 18" Dramatically reduces structural vibrations through walls, floors and ceilings Preserves the accuracy of the original audio track Tightens bass and increases low-end clarity Dimensions:18L x 22W x 1.75H ; Isolation platform and supports up to 200 pound subwoofers Works to isolate subwoofer from the ground/floor surface