SSOT v3.7 · Contractor Detail Drawing · Acoustic Design Basis

Acoustic Panel & Bass Trap Installation

Installation details for 1200 × 600 × 100 mm absorption panels, 300 mm bass traps, and N=7 QRD diffusers. Mounting hardware must preserve isolation and allow future inspection where marked [AC].

Absorption Panel
1200 × 600 × 100 mm
Bass Trap
300 mm legs + 50 mm air gap
QRD Width
7 wells @ 85 mm
AFF Zone
1400–2000 mm

Section A — Absorption Panel Installation

RWA45 · removable mounting

All absorption panels use French cleats and must remain removable for service inspection. Maintain the stated edge clearances when aligning first-reflection panels and corner panels.

Drawing A1 — French Cleat Side View

Matching 20 × 20 mm aluminium cleats on wall and panel back, fixed 50 mm down from panel top edge.

Removable for inspection [AC] 50 mm 20 × 20 mm aluminium cleat Panel locks under gravity once hung

Drawing A2 — Spacing Rules

Maintain edge clearances so panels do not short-circuit corners or touch floor / ceiling finishes.

50 mm 50 mm 25 mm from corner face 50 mm gap from ceiling 50 mm gap from floor Corner panels stop 25 mm off return wall

Drawing A3 — Concrete Wall Anchor

Fischer FUR 10 × 80 anchor with neoprene washer isolating the cleat from the concrete wall face.

Isolating washer prevents flanking [AC] Fischer FUR 10 × 80 anchor 8 mm rod · 100 mm embedment Neoprene washer between cleat and wall

Section B — Bass Trap Installation

300 mm RWA45 corner traps

Bass traps are not pushed tight into the corner. The 50 mm air gap behind the triangular section improves low-frequency absorption and must remain unobstructed.

Drawing B1 — Corner Mount Plan View

Triangular trap with 300 mm legs, 50 mm rear air gap, and two anchors at 600 mm vertical centers.

50 mm air gap 300 mm leg Air gap enhances low frequency absorption 2 wall anchors at 600 mm height centers

Drawing B2 — Floor / Ceiling Connection

The trap sits on the float floor, not the structural slab, and must stop 25 mm below the acoustic ceiling line.

25 mm Must not bridge floor / ceiling isolation [AC] Bottom bears on finished float floor only Top stops short of ceiling by 25 mm

Section C — QRD Diffuser Installation

N = 7 diffuser

QRD panels are mounted on two French cleats and centered between 1400 mm and 2000 mm AFF on the south walls of the Control Room and Video Studio.

Drawing C1 — Well Depth Profile

Quadratic residue sequence depths in millimeters. All well widths are 85 mm.

0 43 86 43 171 43 86 7 wells @ 85 mm Depth sequence: 0, 43, 86, 43, 171, 43, 86 mm Face width = 595 mm overall

Drawing C2 — Mounting Height and Cleats

Two French cleats support each 8 kg diffuser. Centered between 1400 mm and 2000 mm AFF on the south wall.

1400–2000 mm AFF center zone 2 French cleats · diffuser weight 8 kg Control Room south wall centered at listening zone Studio south wall centered in talent background line