Materials: acoustic foam, wood/plastic Size: 230×500×100 mm The «REBAT-F» bass traps feature velvet fabric and combine low-frequency absorption with sound reflection via acoustic foam and a dispersion plate. Ideal for reducing reverberation and standing waves in various spaces. A 100mm acoustic foam base ensures efficiency. Best placed in corners under ceilings or on walls if space is limited. ITEM SPECIFICS: • Function: Absorption & Diffusion • Absorption: Low Frequencies • Material: Laminated HDF & M1 Foam, Velvet Cover • Colors: 10 HDF & 11 Fabric Variants • Fire Class: Euroclass E • Scattering: 200Hz–5000Hz • NRC: 0.41 • Thickness: 100mm (4") APPLICATIONS: Studios, Theaters, Music & Office Rooms, Auditoriums, etc. USE: Absorbs low/mid/high frequencies, slap echo, and noise. MOUNTING: • Vertical: Double-sided tape (included) • Ceiling: Construction adhesive (liquid nails).