Idler Drive Professional Turntable System
The Commonwealth type 12D three and four speed turntables have been designed to meet the rigid specification demanded by professional users of microgroove and stereo recordings.
The machines are designed and built to maintain their performance for very long periods of continuous use.
12D/3 is a three speed unit and the 12D/4 four speed
Platter: 12" diameter
Weight: 6.5 Lbs
Speeds: 16.66, 33.33, 45.11 and 77.93 rpm
Speed tolerance: 0% to 0.25%
Wow and flutter: less than 0.1% RMS
Rumble: better than -50dB below recorded signal
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Commonwealth 12D / 12D owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Commonwealth.