IsoAcoustics ISO-PUCK 76 Vibration Isolators for Studio Monitors and AmpsFrom heavy amps to full sized PA speakers, IsoAcoustics' plus sized ISO Puck delivers the acclaimed acoustic isolation on a larger scale. These 3" diameter, 1. 5" tall ISO Puck 76 discs sit between your speaker's feet and the floor, where they tame the transfer of vibrations between the cabinet and the floor or other surface it's sitting on. Cupped tops let each cabinet's foot nestle securely in place to prevent misalignment and tipped over gear. Each