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AlphaSorb® Acoustic Foam Bass Trap

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Return Policy: This product is non-returnable

Typical Shipping Lead Time: 2-3 weeks

Product Description

Our AlphaSorb® Acoustic Foam Bass Trap is built to provide maximum broadband absorption and low frequency control for listening environments that demand high-quality clean sound. Choose from either a flat or convoluted pattern and 2 ft. or 4 ft. heights for maximum design versatility. The lightweight, wedge-shaped construction of the bass trap allows for easy corner mounting, either vertically or horizontally. These acoustic bass traps can simply rest on the floor in the corners, or you can adhere the trap with water-based foam construction adhesive.

Our AlphaSorb® Acoustic Foam Bass Traps are entirely made from a Class 1 fire-rated melamine foam, making them well suited for use in both public and private spaces. These bass traps are commonly used in the broadcast and recording industries, concert spaces, and home theaters.


  • Broadcast, Recording & Sound Studios
  • Production Facilities
  • Music Rehearsal Spaces
  • Home Theaters & Critical Listening Environments


  • Reduces echo and reverberation
  • Improves speech intelligibility
  • Exceptional low frequency response
  • Mold-resistant, fire-retardant

Technical Information for AlphaSorb® Foam Bass Trap

  • Size: 24″ or 48″ height; 17″ (nominal) face width
  • Material: Open-cell melamine-based foam
  • Intended Use: Interior, sound absorption for corners
  • Finish: Natural Grey, Natural White
  • Pattern: Flat or Convoluted
  • Density:
    • Natural Grey: 0.56 +/- 0.09 lb / sq ft
    • Natural White: 0.47 +/- 0.13 lb / sq ft
  • Service Temperature: -40 deg. F to 350 deg. F
  • Fire Rating: Class 1 or A per ASTM E84
Sound Absorption (Hz) Type J Mount
Pattern 63 125 250 500 1000 2000 4000 NRC
Flat 0.27 0.86 1.91 1.81 1.45 1.24 1.08 1.60
Convoluted 0.18 0.61 1.35 1.26 0.98 0.84 0.74 1.10
Sound Absorption (Hz) in Sabins Type J Mount
63 125 250 500 1000 2000 4000
1.77 5.72 12.65 12.01 9.63 8.22 7.13
1.78 6.0 13.48 12.58 9.77 8.40 7.41

Installation Method

  • Easily mount these bass traps in any corner with water-based construction adhesive
  • Ceiling installations may require additional support and cure time
  • Sand all glossy surfaces
  • Ensure all surfaces are clean, dry, structural sound and free of dust, grease, oil or other debris prior to installation
  • For best results, install this product at the end of your construction project
  • Use clean gloves to prevent soiling material
  • Melamine foam is fragile, please handle with care
  • Do not install material of unacceptable quality

For more information on our AlphaSorb® Acoustic Foam Bass Trap,
call us at 800.782.5742 or contact our sales department.

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