PlatFoam Isolation Sheets are 1" sheets of high density foam that offer isolation and decoupling benefits. Sixteen sheets measuring 4' x 2' are included in the package and provide the simplest, most cost effective way to decouple speakers when installing speakers in wall enclosures or cabinets. By covering the entire floor of an enclosure, PlatFoam Isolation Sheets will help to absorb errant resonant frequencies produced by speakers, any structural resonance will be reduced and tonal quality will be greatly improved.