Schroeder Acoustic Diffuser "QRD 2D N7"

The QRD 2D N7 Schroeder Diffuser is a professional-grade acoustic panel based on the Quadratic Residue Diffuser (QRD) formula developed by physicist Manfred R. Schroeder. Designed with precision and made from high-quality sanded birch plywood, this diffuser enhances acoustics by scattering sound in a two-dimensional, spherical pattern.

The design features 49 mathematically calculated well cells, providing effective diffusion across a wide range of frequencies from 500 Hz to 8000 Hz, especially targeting the midrange — the most perceptually sensitive area for the human ear.

Thanks to its closed rear panel, deep 11 cm profile, and comb-joint frame, the panel ensures structural stability and acoustic efficiency. 

ITEM SPECIFICS:

‣ Product: QRD 2D N7 Schroeder Diffuser

‣ Function: Acoustic Diffusion (2D QRD)

‣ Frequency Range: 500 Hz – 8000 Hz

‣ Material: 3mm Birch Plywood, sanded

‣ Dimensions: 50 x 50 x 11 cm / 19.7" x 19.7" x 4.3"

‣ Weight: Approx. 3 kg

‣ Construction: 49 wells, closed back panel, comb-joint frame

‣ Finish: Natural birch (ready to paint/oil)

APPLICATIONS:

Recording Studios | Mixing Rooms | Home Cinemas | Listening Rooms | Rehearsal Spaces | Churches | Theaters | Control Rooms

BENEFITS:

✓ Accurate 2D spherical sound diffusion

✓ Eliminates flutter echoes and early reflections

✓ Improves clarity, liveliness, and spatial imaging

✓ Works especially well in mid and high frequencies

✓ Elegant natural wood look with professional build quality

INSTALLATION:

There are hooks on the back of each diffuser that can be used to easily hang the diffuser on the wall.

--------------------------------------------------------