Prime7™ Mid-Range Quadratic Residue Diffuser


Prime7™ Mid-Range is a mid-frequency design for reflective phase grating diffusers that is computer-optimized utilizing quadratic residue number theory with periodic principles and an innovative well design that reduces overall thickness while increasing performance over standard designs. Prime7™ Mid-range are engineered and manufactured to provide one-dimensional (horizontal or vertical) diffusion and wide-range scattering of sound energy without resonances, high-Q reflections or excessive absorption.


Prime7™ Mid-Range is an ideal solution for rooms and spaces where one-dimensional diffusion and wide-range scattering of sound energy is desired. Some applications include:

  • Music Spaces
  • Recording Studios
  • Auditoriums
  • Performing Arts Centers
  • Lecture Halls
  • Churches
Technical Features

  • Thickness (Nominal): 2”
  • Sizes (Nominal): 17” x 96″
  • Facing: Wood Veneer, Laminates and Custom Finish Facings
  • Finish: Natural, Stain, Lacquer, Paint, Custom
  • Installation Methods: Z-Clip
  • Weight:  8 Lbs/ Square Foot
  • FSC Certifications: FSC Mix, FSC 100%
  • Fire Performance: Class A

Key Features

  • Once-Dimensional Diffusion & Wide-Range Scattering of Sound Energy Without Resonances, High Q-Reflections, or Excessive Absorption
  • Meticulously Constructed to Dampen Unwanted Resonances & Resist Damage
  • Mid-Frequency Design for Reflective Phase Grating Diffusers that is      Computer-Optimized Utilizing Quadratic Residue Number Theory with Periodic Principles & Innovative Well Design that Reduces Overall      Thickness While Increasing Performance Over Standard Designs
  • Wood Veneer, Laminates and Custom Finish Facings
  • Custom Veneers Available to Coordinate with Designer’s Color Palette
  • FSC Certified Materials Available
  • Up to 10 LEED Credits May Apply With Installation of These Products

Acoustical Data

Frequency (Hz) 125 250 500 1K 2K 4K NRC
Absorption Coefficients - Type A Mounting


Other Wood Species and Slicing Options Available.