Advent Model 100 Dolby Noise Reduction Unit Rack Mount Tested Working Vintage

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Advent Corporation — Cambridge, Massachusetts

Noise Reduction Unit — Model 100 (original, not 100A)

Dolby System licensed | Dual-channel (A & B) | Rack-mount format

Serial: D 04120

FUNCTION: Powers on and confirmed working. Both channel indicator LEDs illuminate. Dolby Level meters responsive. All knobs (Input Levels, Record Level, MX Filter, Output Level) turn freely.

COSMETIC CONDITION:

- Front faceplate: brushed aluminum with surface scratches and oxidation — typical for age

- Rear panel: very clean, all jacks intact and labeled

- No wood cabinet included (rack-mount version)

REAR CONNECTIONS:

- To Amp Input (L/R, binding posts)

- From Tape Recorder Output (L/R)

- To Tape Recorder Input (L/R)

- From Preamp Output (L/R)

- Mic Input A & B (XLR)

- Unswitched AC outlet

- Meter calibration and Rec Cal trim controls

IDEAL FOR: Reel-to-reel tape decks, early cassette decks without built-in Dolby, vintage studio recording setups. Compatible with Ampex, Ampro, Sony, TEAC, Revox, Akai and other period machines.

SHIPPING: Will ship securely packed. Heavy unit — expect $35–50 for ACTUAL ground shipping. Note that I do refund any significant difference, should eBay overcharge.

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