QRD ® 734
PRODUCT OVERVIEW QRD ® 734 has proven to be the most popular and versatile diffusor in the RPG product line. Its wide bandwidth, low cost and a broad selection of finishes make it a logical choice for music education facilities, recording studios, worship spaces, auditoriums, theaters and performing arts facilities. This 1-dimensional diffusor is a modular, computer-designed phase grating that produces a directional hemidisc polar response that can be oriented in any direction. The surface of the QRD ® 734 is designed to provide a more uniform sound field through mid and high-frequency diffusion. In contrast, the natural wood construction of the unit, available in a high recycled content, ULEF, Class A fire-rated and FSC MDF core, limits the amount of sound energy removed by absorption. SIZING • Standard Panels: 23-5/8" W x 23-5/8" L x 9-1/8" D (Custom panel lengths up to 8' are available) • Each panel weighs approx. 8.00 lbs/ft 2
Blue = Diffusion Coefficient Green = Scattering Coefficient Red = Absorption Coefficient - NRC = 0.25, SAA = 0.26
Additional test data is available – please see the Supplementary Acoustical Data Charts online or contact your local RPG Sales Representative.
CORE FIRE RATING Class A (per ASTM E-84) FINISH
Diffusion Coefficient
Frequency (Hz)
QRD ® 734 is available in natural and engineered wood veneers and laminates with clear lacquer or factory color-matching of wood finishes and paint colors. Standard species include Alder, Anigre, Ash, Birch, Cherry, Mahogany, Maple, Poplar, Red Oak, Walnut and White Oak. Custom species may be available on request. INSTALLATION QRD ® 734 is designed to be surface or flush-mounted to a wall or ceiling with factory-integrated blocking. They can be installed singularly or in an array across walls and ceilings.
Frequency 315
0.00 0.10 0.40 0.38 0.40 0.49 0.30 0.41 0.62 0.57 0.58 0.38 0.18
400 500 630 800
1000 1250 1600 2000 2500 3150 4000 5000
RPG Acoustical Systems, LLC. | 99 South St | Passaic, NJ 07055 rpgacoustic.com | info@rpgacoustic.com | 973-916-1166
QRD ® 734 10/2023
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