B-Stock, the t.akustik Diffusor Manhattan wood, diffusor acoustic element made of solid wood, 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 - 3650 Hz, untreated beech wood - may be painted in any variantion by the customer, simple to assemble, dimensions: 600 x 600 x 170 mm, weight: ca. 30 kg, box includes 1 pieces deliverd as assembly kit, assembly kit includes base panel, blocks and manual, B-Stock with full warranty, may have slight traces of use