Acoustic Treatment · Premium
ATS Acoustics QRD Wood 7 Well Quadratic Residue Diffuser 23 x 48 x 6.5 in
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.
- 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 quadratic residue diffuser scatters energy from about 325 Hz to 3 kHz instead of absorbing it, which keeps a treated room from sounding dead. It is the right rear-wall piece once absorption and bass traps are already in place.
Watch out: Needs at least 6 ft between the diffuser and the nearest listener to work as intended.
Pros
- Real QRD math, not a decorative tile
- Solid plywood build
- Mounting hardware included
Cons
- 40 lb, anchor into studs
- Only useful behind a rear wall with enough distance
- Amazon stock is inconsistent
Specifications
| Type | QRD diffuser |
|---|---|
| Size | 23 x 48 in |
| Thickness | 6.5 in |
| Core | Radiata pine plywood, 7 wells |
| NRC | Not applicable |
| Mounting | Wall clips and anchors included |
| Pack size | 1 |
Specs come from manufacturer documentation and published reviews; check the retailer listing for the current revision.