Quad (Acoustical Manufacturing) · Quad transistor era

Quad 606

The larger 1980s Quad power unit, kept in production until the 77 series replaced the range.

Catalogue code: Quad 606
Years: 1986–1997
Type: power amplifier (stereo)
Valves & speakers: 140 W per channel stereo power amplifier, 27,700 built
Lifecycle: retired
Confidence: High

Specifications

Watts: 140
Channels: 2
Technology: solid-state
Inputs_outputs: RCA

Safety

Solid-state: verify output stage and check for the correct mains tap.

01 / Witnesses

What applies here

Marks that can be entered for this maker: Serial number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code, Version & era marker.

02 / Bounds

The model year is a floor

Nothing predates 1986; components only push the date later.

03 / Value

What moves the price

Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.