Rack of Silence

Specifications

Price

Rack of Silence: $1,470–$1,899 (2003, StereoTimes); Reference 3: $1,495 (2009, TAS) / €1,621 ex. VAT (current, Solid Tech)

Base isolation

Cylindrical anodized-aluminum base with extension springs, center hub, and height-adjustable center screw; standard supply is 3 springs (45 kg max load per disc set of 4 at top screw position); adding a second spring set doubles capacity to 90 kg; Heavy-Duty version carries up to 175 kg (385 lb) per set of 4 with 6 of 12 possible springs mounted; resonance frequency well below 4 Hz when properly loaded

Main structure

Extruded aluminum corner pillars, available in black or silver anodized finish; X-shaped skeletal component-support shelves attach via aluminum collars that slip over the pillars, with infinitely adjustable shelf spacing

Shelf isolation

Milled grooves in each shelf hold upward-facing ball bearings that components rest on (with rubber O-rings to prevent marring); "Reference" line's center Super Shelves are suspended on coil springs, adjustable by adding/removing springs, with locking safety screws

Shelf top materials

Apparatus supports made of extruded aluminum, acrylic-glass coated both sides, cork-lined underside and top for resonance control; optional concrete small top shelves (10 kg, 490×430×22 mm) and veneered large top tables (4-layer cork/MDF/damping/MDF sandwich, various wood finishes)

Isolation performance

Feet of Silence, Disc of Silence, and shelf-spring suspension are tuned to a resonance frequency well below 3 Hz, with isolation onset around 4 Hz; system can combine up to 3 isolation stages (base discs, shelf suspension, and additional feet at the component)

Reference 3 dimensions

W700 × D500 × H600 mm (also cited as 23.625" × 27.5" × 19.75" with 20.75" between pillars); weight 11 kg; 3 shelves

Standard full rack footprint

W700 × D500 × H900 mm, 520 mm between pillars, up to 538 mm max spacing between shelf levels

Base isolation disc of silence

Cylindrical anodized-aluminum base with extension springs, center hub, and height-adjustable center screw; standard supply is 3 springs (45 kg max load per disc set of 4 at top screw position); adding a second spring set doubles capacity to 90 kg; Heavy-Duty version carries up to 175 kg (385 lb) per set of 4 with 6 of 12 possible springs mounted; resonance frequency well below 4 Hz when properly loaded

Basic heavy duty shelf load rating

Basic shelf: 40 kg max; Heavy-Duty shelf: 80 kg max

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