Product Description

Furniture grade QRD® diffusors may be too heavy for some ceiling applications or too expensive for large scale coverage. There is a need for a lightweight, Class A, cost effective, plastic QRD®.

To address this problem, RPG® developed a lightweight, thermoformed panel made of Class 1 firerated Kydex®. The diffusor has graceful curved inner and outer radii for an attractive appearance. Kydex® is stiff and impact resistant allowing the Formedffusor™ to be used in almost any wall or ceiling application.

Since it’s introduction in 1984, the number theoretic QRD® 734 Diffusor has proven to be a versatile general purpose diffusor. It’s uniform scattering, wide bandwidth, and broad selection of finishes make it a logical choice for almost any speech, critical formRlistening, or performance facility. The Formedffusor™ brings this proven technology to a wider audience because of its low price, ease of
installation, Class 1 fire rating, light weight, impact
resistance, and color and texture options.

The Formedffusor™ is designed to offer wide angle, broad bandwidth sound diffusion as well as useful low frequency absorption. These features control excessive boominess and balance the room’s reverberation response. The Formedffusor™ can be used to offset the usually predominate high frequency absorption of people, drapery, rugs, and porous materials.

The Formedffusor™ is based on the QRD® reflection phase grating introduced by RPG® in 1983. It offers broad bandwidth wide angle diffusion. The graph illustrates the average diffusion coefficient (1 is ideal) for all angles of incidence. Compared to a flat reflecting panel, the QRD® maintains uniform diffusivity as a function of frequency above the diffraction limit.

The Formedffusor™ can be wall mounted or suspended in a T-bar grid. Panels can be aligned to form a 1D diffusor array or staggered 90° for a 2D diffusor arra


QRD® number theory sound diffusion
Lightweight thermoformed fabrication
Low frequency diaphragmatic absorption
Custom colors and textures
Can be oriented to provide one or two dimensional diffusion in the far field
Panels nest into one another
Low frequency absorption can be used to control boominess in small rooms, while also providing uniform sound diffusion
Thermoformed panels are designed to nest for lower shipping costs
Diffusors can be aligned linearly for diffusion in the direction perpendicular to the well direction or rotated 90° forming an alternating pattern to provide omnidirectional scattering
600 x 600 size offers more flexibility and higher diffusion performance than larger periodic 1200 x 1200 formats with a smaller repeat unit
The Formedffusor™’s light weight makes handling and installation simple

Music education facilites, Recording studios, Broadcast studios, Rehearsal rooms, Classrooms, Auditoriums, Worship spaces, Cinemas, Performing arts centers and many more.