A QRD diffuser is an acoustically hard surface which, because of its calculated 3D-design, scatters sound waves that strike it both spatially and spectrally. The diffuser can do this within a targeted working range, usually the range in which fundamental musical tones are found (c4 octave).

Every model has a practical working range that spans over 4 octaves.

Our Quadratic residue diffusers (QRD) can be an essential and powerful tool in the acoustic optimization of any room in which high-end sound (=read Natural sound) reproduction is a goal. Opera’s – studio’s etc… all use diffusers for correct & natural sound (also the human voice is very clear & very good audible without false “ringing” in the room)
6 x 2 meter diffuser model QRD7340.
4 x diffuser diffuser box QRD WW3.
Price: € 5875,00 – € 7637,50