The BRS Acoustics Quadratic23A is a 1D quadratic residue (Schroeder) diffusor panel containing 23 wells. It's bandwidth ranges from 850Hz to 8.5kHz. Ash wood.
It is designed to flatten comb filtering of critical rooms such as control rooms, recording booth, live rooms, mastering suites, listening rooms, home theater, etc. Available in many local and exotic woods. Ask for quote. BRS Acoustics hardwood diffusor panels are handmade in Canada from carefully selected wood.