Ekustik Woody Fractal 34 Duopack, QRD Diffuser, Prime n7 diffuser calculated according to Schröder with a panel depth of only 10 cm, For scattering sound waves from 350 Hz to over 8 kHz, Dimensions (H x W x D): 1200 x 280 x 100 mm, Weight: Approx. 10 kg per diffuser, Quantity: 2 pieces, Colour: Black, Incl. Wall mounting system, Handmade in Czech Republic