Corner-Specific Design (4-Pack) — Universal-size corner acoustic foam, designed for noise reduction in wall corners—suitable for use in home recording studios and theaters.

Not every corner requires a specialized shape—this universal-style 4-piece set of corner acoustic foam meets the acoustic needs of most households with its classic dimensions and reliable performance. Each piece takes the form of a standard right-angle triangular prism, measuring 12 × 12 × 17 inches (L × W × H). They are constructed from standard open-cell polyurethane foam with a density of 18 kg/m³; the surface features a smooth or lightly textured finish, devoid of complex geometric patterns. Although seemingly simple in design, their sound-absorbing capabilities have been rigorously tested: they effectively reduce reflected sound in the mid-to-high frequency range (above 500 Hz) at wall corners. Furthermore, thanks to their substantial volume, they also demonstrate excellent absorption performance in the low-to-mid frequency range (200–500 Hz). Each package contains four pieces—sufficient to treat the four vertical corners of a living room or home theater space approximately 20 square meters in size. Installation is remarkably simple: simply peel off the backing from the included double-sided adhesive strips and apply them to a clean, dry wall surface. Whether you are a newcomer to acoustic treatment or simply looking to quickly resolve echo issues in your home theater, this product set represents an entry-level option offering exceptional value for money. The black-and-gray color scheme also allows it to blend naturally with most home interior styles.