QRD 734®

RPG QRD 734®

The QRD® 734 has proven to be the most popular and versatile diffusor in the RPG® product line.  It’s wide bandwidth, low cost, and broad selection of finishes make it a logical choice for music education facilities recording studios, worship spaces, auditoriums, theaters, and performing arts facilites.

This one dimensional diffusor is a modular, computer designed phase grating which produces a directional hemidisc polar response that can be oriented in any direction. It also provides low frequency absorption below the design bandwidth due to the RPG pressure gradient mechanism.

Problem

Interfering reflections that degrade speech intelligibility, gain before feedback, and music quality can be controlled by absorption and diffusion.  Since commercial surfaces that provided uniform diffusion over a wide frequency range and for all angles of incidence were not available, absorption was used solely to control reflections. This treatment created ®dead” spaces.

Solution

In 1983, RPG® introduced the first commercial QRD® Diffusor, based on mathematical number theory.
Now a predictable diffusive surface treatment is readily available.

Features

• QRD® sound diffusion - Custom Finishes are available
• Distinctive textured appearance - Can be surface or flush mounted
• Can be oriented to provide two dimensional diffusion in the far field
• Available in transparent plexiglass:

Benefits

• Attractive finish allows its use in a variety of decors
• Can be used to control unwanted reflections without adding additional absorption

Applications

Recording studios, Music education facilites, Band rooms, Home theater
Post production studios, Worship spaces,Auditoriums, Performing arts centers