B-Stock, t.akustik Diffusor Wave eps 120; diffusor acoustic element made of hard EPS foam, for the optimization of room reflections in the mid and hi-mid frequencies; best used for recording studios, broadcast stations, homerecording and HiFi-rooms; sonical efficiency from 900 - 3250 Hz; can be easily painted using water-based paints (must not contain solvents!); Dimensions: 1200 x 600 x 190 mm (max. High); box includes Diffusor + Counterpart; acoustic glue is recommended for installation, B-Stock with full warranty, may have slight traces of use