Adelsklang QR-49 PRO Black & White, Acoustic diffuser, Two-dimensional diffuser to optimise the sound of the room, QRD design with 49 chambers of different depths to diffuse the sound, For enhancing the sound characteristics in sound studios, listening rooms, home cinemas etc., Increases three-dimensionality, liveliness, dynamics and detail of the sound, Prevents flutter echoes and disturbing resonances, Comb joint frame connections, Closed back with 4 suspension points, Material: Birch wood, Dimensions (H x W x D): 50 x 50 x 11 cm, Weight: Approx. 3 kg, Colour: Black/white stained, Handmade in Germany