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Originally Posted by Jeffrey Hedback  the Auralex SpaceCoupler it is 3/8" Paulonia wood which is an instrument grade wood. I do think the wood itself has bearing on it's overall effectiveness. |
Wood used for musical instruments is selected for its resonant properties, and is then carefully sculpted to vary the wood's thickness over distance to reinforce the fundamental and harmonic frequencies generated by the strings. But for diffusors and "space couplers" etc I'd think it's best for the wood to be rigid and non-resonant. Otherwise, resonances will be added into the room.
--Ethan