Auralex PlatSheet - 1" Foam 2x4 Foot Isolation Sheet (Box of 8)Platsheet is made of the same material, and has the same properties as Platfoam but is available in sheet form. When installing speakers in wall enclosures or cabinets, 1" Platfoam is the simplest, most cost effective way to decouple your speakers. The structural resonance will be reduced and the tonal quality will be greatly improved through the isolation Platfoam yields. Dimensions: Platsheet: 1 x 24 x 48 sheets of high density foam Box Quantity: