Art3d 4 Wood Slat Acoustic Panels for Wall and Ceiling - 3D Fluted Sound Absorbing Panel with Wood Finish - Oak : Amazon.ca: Musical Instruments, Stage & Studio
2x4 Acoustic Wall Panel - Solar Sunday – TheQuietRoom
Heres how to DIY some simple acoustic panels for your theater, total cost $28 for each 2x4' panel. Sorry for the crap camera. : r/hometheater
1×4 Ft (8" Thickness) Acoustic Panels / Bass Traps - John Hunter Acoustics