Acoustic Treatment

• 48 x 24 x 4 in, corner cut
• Mineral wool core (Rockwool)
• Avg NRC 0.95+ (mfr)
• DMD fabric, USA made, 22 lb

A 4 in thick mineral wool trap with a trapezoid back that sits flat in a wall corner, which is where most rooms need bass control first. Buy a pair for the front corners.

• 24 x 48 x 2 in
• Rockwool AFB mineral wool core
• NRC 1.00 (independent test)
• Class A fire rated, Guilford of Maine Sona fabric

The standard 2 in mineral wool panel for first reflections and rear walls, with published third-octave absorption data and a Class A fire rating that many cheaper panels lack. Plan on four to eight for a typical room.

• 24 x 48 in, 13 in deep at center
• Rockwool Rockboard 60 + AFB core
• NRC 1.60 (published)
• Wood frame, jute fabric, 40 lb

At 13 in deep this is a real corner trap, not a thick panel, and ATS publishes full absorption data down to 50 Hz. It is the trap most often recommended over GIK in Gearspace and AVSForum comparisons for the money.

• Six 24 x 48 x 2 in panels
• 6 lb/ft3 high-density fiberglass
• NRC 1.00 (published)
• Class A fire rated, impaler mounts included

A six-panel kit from a brand used in commercial studios, with resin-hardened edges and a published NRC of 1.00 for the 2 in panel. One box treats the first reflection points of a typical theater.

• 23 x 48 x 6.5 in, 40 lb
• 7-well QRD, radiata pine plywood
• Scatters 325 Hz to 3 kHz
• Wall clips and anchors included

A true quadratic residue diffuser rather than a decorative wood tile, for the rear wall behind the seats once absorption is handled. Place it at least 6 ft from the nearest listener.