Acoustics First Corporation. Materials to Control Sound and Eliminate Noise. TM
Products » Diffusers/Diffusors » QuadraPyramid Sound Diffuser

QuadraPyramid™ Sound Diffuser


Available Size:
23.75” x 23.75” x 2.75”

Material:  Class A Thermoplastic

Direct mount (wall or ceiling) or Drop into T-Bar Grid

Fire Rating:  Class 1 (A)


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The QuadraPyramid™ is a variation of the traditional offset pyramidal diffuser.  It’s patented low profile design presents four pyramids to create sixteen angles of reflection on the surface of a single 2’ X 2’ panel, with each pyramidal quadrant rotated 90 degrees.

The QuadraPyramid is used to provide sound clarity and greater perceived spatial response while at the same time delivering desirable, targeted absorption at lower frequencies.  The QuadraPyramid ships “nested” to reduce both freight cost and storage space. Quantities are typically available to ship from stock

The QuadraPyramid™ Diffuser generates a uniform polar response over a broad frequency range. There is very little sound absorption when used as a ceiling mounted device in a standard grid (15/16") (NRC=0.10).  When wall mounted in a specific manner, it becomes a mid-bass absorber in the range of 250 Hz (0.60 SAC) with the skirt of the bell curve extending down to 125 Hz on the low end and 315 Hz at its upper limit (NRC=0.20).


QuadraPyramid- Specs.pdf
Sound Absorption Coefficients
Mounting 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
Type A 0.23 0.58 0.05 0.04 0.04 0.11 0.20
E400 0.28 0.17 0.09 0.07 0.10 0.14 0.10
*Note: Polar Plots available upon request.
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WARNING: This product can expose you to chemicals including Antimony Trioxide (A Fire Retardant), which is known to the State of California to cause cancer. For more information go to