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Advent 100A

Noise Reduction Unit (1972)

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Advent 100A


The Advent Model 100A Noise Reduction Unit is a convenient control center designed to take full advantage of the ever increasing use of the famous B-Type Dolby System audio noise reduction.

The widespread use of the Dolby System with home tape recorders, the rapidly growing catalogue of prerecorded Dolby processed cassettes, and the application of the Dolby System to FM broadcasting have all contributed to our incorporating into the Model 100A a degree of flexibility found in no other noise reduction unit or recorder with Dolby circuitry built-in.

In addition, the needs of those interested in serious live recording, so often a secondary consideration in equipment designed for consumer use, have been of equally important concern in the design of the Model 100A and its accessory microphone preamplifier, the MPR-1.


Channels: 2

Input sensitivity: 100mV

Output level: 1V

Noise reduction system: dolby

S/N improvement: 10dB (dolby)

Dynamic range: 85dB

Frequency response: 20Hz to 20kHz

Signal to noise ratio: 70dB

Total harmonic distortion: 0.1%

Dimensions: 11-3/4 x 4-1/8 x 7-1/2 inches

Year: 1972



re: model 100A

Do you want Model 100 (no A) documents as well?

Double_Trouble2's picture

re: model 100A

Yes please. Thanks.

re: model 100A

Yes please!

Double_Trouble2's picture

re: model 100A

I have both the 100 and 100A for which, if different, I need to obtain all the information possible//especially hook-up info and disassembly of front panel(s). I have a working 100 with a dented faceplate I need to change with one non working unit with a pristine faceplate. Thank you.

This website is not affiliated with or sponsored by Advent. To purchase 100A spares or accessories, please contact the company via their website or visit an authorised retailer.