Wall Quadratic Residue Diffusers
A narrow vertical diffuser for wall-mounted acoustic arrays. The quadratic residue range combines wells of different depths in a 310 mm-wide module, with three catalogue heights for coordinating the wall elevation.
Where it belongs.
Plan these modules as a diffusion surface in cinemas, control rooms and listening rooms. Review the proposed positions, array width and listener distance together. Absorptive panels may be specified alongside the diffusers, but they remain separate products with different acoustic functions.
Typical spaces
- Private cinemas and hi-fi rooms
- Recording control rooms
- Music rehearsal and listening spaces
Keep the function clear
The 310 mm PS wall module is not the slim aluminium QRD profile or the square ceiling diffuser. Do not transfer performance data between these ranges. A claimed operating band needs supporting data for the actual module and array.
Diffusion and absorption, specified separately.
A studio may need both treatments. The illustrated narrow woodgrain modules are diffusers; the surrounding flat fabric-faced panels are not the same product. Schedule each treatment by function and position.
Product specifications
Catalogue formats are a starting point for enquiry. Confirm the current supplied construction, finish and dimensions in the quotation.
- Catalogue models
- YBS-KS-0001 / YBS-KS-0002 / YBS-KS-0003
- Module width
- 310 mm
- Catalogue heights
- 1200 / 1500 / 1800 mm
- Module depth
- 80 mm
- Material and face
- PS with heat-transfer woodgrain finish
- Arrangement
- Vertical wall modules, individually or in coordinated arrays
Before ordering
- Send room dimensions, speaker positions and listener locations for placement review.
- Provide wall width, required height, module quantity and adjacent acoustic treatments.
- Approve the finish sample, mounting substrate and attachment detail before ordering.
Make the next decision with the right information.
Planning your selection
How is this different from the aluminium QRD range?
This range uses 310 mm-wide, 80 mm-deep PS modules. The slim aluminium range uses a different material, profile and wall assembly. They require separate specifications and samples.
How many modules should a room use?
There is no reliable fixed count from room area alone. Share the room geometry, speaker and listener positions, existing treatments and the available wall dimensions for a layout review.
Connect the product to your space.
These planning guides explain room requirements and product choices. They are application guidance, not completed-project case studies.
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