t.akustik Spektrum D40 Diffusor, Acoustic Diffuser, For the dispersion of sound reflections, Increased the perceived spaciousness of small and medium-sized rooms, Well suited for recording studios, theatre, and hi-fi environments, Effective frequency range: 1950 - 3440 Hz, Material: Lacquered ash wood, Dimensions: 600 x 600 x 100 mm, Weight: 12.5 kg, Includes 4 mounting clips for wall mounting (screws not included)