4" Pyramid Foam

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For maximum sound absorption, the 4 inch pyramid foam is the product for the job. Excellent at absorbing low frequency waves, it provides maximum deadening capability and functions in the largest areas, like gyms or concert halls.

Foam Colors Available
Acoustical Performance Data
Overall NRC: 0.65
4 Inch Pyramid Performance Graph
To view the full PDF report of our acoustical test results, see the resources section (below).

Flammability Test Results
Classification: Class A
Flame Spread Index: 25
Smoke Developed Index: 250

Acoustical Performance Data: NRC Ratings for Pyramid Foam
Leading Competitor Comparison: Acoustic Foam Product Comparisons
Flammability Test Results: ASTM-E84
Physical Data Sheet: Acoustic Foam Physical Data Sheet
Frequently Asked Questions: FAQ
How To: How To Use Spray Adhesive with Acoustic Foam (PDF)


Manufacturing Tolerances
Products may carry a size tolerance depending on the style and job. Please see our Tolerance Table.

Color Availability
Size and quantity selections will affect color option availability.

Pyramid vs. Wedge Absorption
To create the pyramid style, this foam must pass through our machine twice, resulting in a higher cost than the wedge for a more visually pleasing product. With less overall mass than our wedge foam, it provides about 76 percent as much absorption than the wedge, but has a better diffusion rate.

Write a Review

Fantastic foam
Crossworm | April 3rd, 2024
As a heads up… let your foam expand for three days before putting it up. Or there will be gaps between panels and it will drive you crazy. Great foam. I love the look and use of the 4” pyramid foam. Fed ex wouldn’t deliver it or explain why. So I had to have it shipped to a different address after about a week of their lack of attempts. But that’s their fault not this company. This is the third time I’ve treated a studio using foam by mail. No one is more affordable, nor as prompt with delivery.
Jeff Stewart | June 10th, 2022
I went with the 4” pyramid foam inside my booth. This stuff is absolutely perfect for a vocal booth, and the service was fast, professional, and without any hassle whatsoever. If you need acoustic foam, look no further!