Acoustic Treatment · Budget
Color Acoustic Foam Bass Traps, Bulk 24 x 12 x 12 in XL Soundproofing Studio Foam Bass Trap Bundle (4 Pack, Charcoal)
The direct stand-in for the Auralex LENRD 4-pack: the same 12 x 12 x 24 in corner wedge format from SoundAssured, a US foam maker that publishes a Class A ASTM E84 fire rating and an NRC 1.20 figure and ships from its own Amazon storefront. Four wedges stack to fill an 8 ft corner and weigh almost nothing.
- Four 12 x 12 x 24 in foam corner wedges
- Polyurethane foam, ASTM E84 Class A fire rated
- NRC 1.20 (manufacturer)
- Adhesive or push-pin mount, adhesive sold separately
This is the same 12 x 12 x 24 in corner-wedge format as the LENRD, and SoundAssured is one of the few Amazon foam sellers that states an ASTM E84 Class A fire rating and manufactures in the USA rather than reselling imported foam. Four wedges cover an 8 ft corner for about 125 USD, and the wedge profile gives more surface area than a flat block for the mid-bass range foam can actually reach.
Watch out: Foam of any brand does little below about 100 Hz; a 13 in mineral wool trap is the real fix for room modes, and the NRC figure is the maker's, not an independent report.
Pros
- LENRD format at a lower price
- Class A fire rating, made in USA
- Sold and shipped by the manufacturer, 13 colors
Cons
- Limited effect below 100 Hz
- No published per-frequency lab data
- Adhesive mounting can mark walls
Specifications
| Type | Corner bass trap, foam wedge |
|---|---|
| Size | 12 x 12 x 24 in each |
| Thickness | 12 in corner wedge |
| Core | Not published |
| NRC | 1.20 (manufacturer) |
| Mounting | Spray or construction adhesive, mounting tape, T-pins, or SoundAssured adhesive squares, sold separately |
| Pack size | 4 |
Specs come from manufacturer documentation and published reviews; check the retailer listing for the current revision.