John Boulton Signature System Master Controller Preamp 1974 Vintage Rare

John Boulton Signature System Master Controller — the central

preamplifier/control unit from a 1970s John Boulton whole-home audio

installation. A genuine rarity; estate-sourced, working condition reported

but not personally tested by seller.

Background:

- John Boulton Acoustics (New York) produced luxury built-in residential

sound systems in the 1960s–1980s, sold exclusively to ultra-wealthy

clients. Original system installations cost tens of thousands of dollars.

- Boulton declared bankruptcy in the mid-1980s. Surviving pieces appear

rarely; most remain in original estate installations.

Item Details:

- Brand: John Boulton Acoustics (Boulton Music Systems, Inc., New York)

- Model: Signature System Master Controller

- Type: Preamplifier / Audio Control Unit

- Serial/Service No.: 43-1058

- Part No.: 12/NL163 (per Boulton Means Service label)

- Date code: 740610 (June 10, 1974)

- Controls: Selector (Phono/Radio/Tape), Tape Recording Loudness,

Treble Equalizers (Left/Right), Bass Equalizers, Stereo Blend,

Sound Balance, Master Volume

- Indicators: Recording in Progress, Stereo/Monaural, Local Monitor,

Standby, In Use — indicator lamps illuminate

- Housing: Oak-veneered wooden panel; dark burgundy faceplate

- Wiring: Original proprietary multi-pin interconnect harness included;

terminates partially to RCA connectors at cable ends

- Connector type: Proprietary Boulton multi-pin (non-standard —

see photos)

- Country of Manufacture: USA

Condition:

- Estate-sourced; working condition reported but not personally

confirmed by this seller — sold as-working