Materials: acoustic foam, wood/plastic Size: 230x500x100 mm (9x20x4 inches) The «WAVE» bass trap combines low-frequency absorption and sound reflection via acoustic foam and a dispersion plate. It reduces low-frequency reverberation and standing waves, making it ideal for studios, home theaters, offices, and more. The 100mm (4") acoustic foam base ensures high efficiency. Best placed in ceiling corners or wall corners with limited space. SPECIFICS: • Function: Absorption & Diffusion • Frequency: Low Frequencies • Material: Laminated MDF & Foam (M1) • Color: Black graphite foam / MDF in 10 colors • Fire Class: Euroclass E • Scattering: 200Hz - 5000Hz • NRC: 0.41 MOUNTING: • Vertical: Double-sided tape (included) • Ceiling: Construction adhesive (liquid nails)