DIY Acoustics: Building Your Own Tube Traps — SonicScoop
Edwyn Acoustics Bass Trap 1.2m tall ( Stackable ) available in Black or Beige – Absorption and Diffusion. Recommended to be placed in the corners of the room $599 - Simply Hifi
DIY Bass Traps - Tube Trap Diffuser - Corner Trap Sound Panel - 16 Inch Dia Full Round KIT | Reverb Deutschland