The BRS Acoustics Quadratic121A is a 2D quadratic residue (Schroeder) diffusor panel containing 121 wells. It's bandwidth ranges from 850Hz to 4,2kHz.
It is designed to flatten comb filtering of critical rooms such as control rooms, recording booths, 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.