3M Professional Mastering System


Message Board - 3M M23 Magnetic Tape Machine - General Discussion
3M Professional Mastering System (Instruction Manual)

The Dynatrack Machines, by Dale Manquen of MANCO

The 3M Brand Professional Audio Recorder was manufactured by the Mincom Division of the 3M Company in Camarillo, California. It fulfills a requirement in the professional recording industry for the ultimate quality in tape recording.

The continued improvements in records, tapes, and playback equipment revealed deficiencies in original master recordings. The 3M Brand Professional Audio Recorder overcomes these problems and provides improved master music tapes -- improvement readily discernible by ear.


This new tape recording system has been developed by 3M engineers to fulfill the requirements of critical recording studios for improving the quality of master music tapes. Continuing improvements in playback equipment and in records and tapes have revealed deficiencies in original mastering equipment; the 3M Professional Mastering System overcomes these problems, providing improvements you can actually hear.

The 3M Professional Mastering System affords significant improvements over present recording equipment in three areas. Perhaps most important is a major improvement in signal-to-noise ratio, an increase of up to 15 db. The second area of improvement is a new tape drive system that reduces flutter to half that present in other tape transports. Thirdly, the entire system affords an operating and editing ease unmatched by any other tope recorder. Another important improvement which is not readiily discerned is an increase in long-term reliability, due to the exclusive use of silicon transistors throughout the electronic assemblies, plus the simplified tape drive system.

Without a doubt, the new 3M Professional Mastering System is a landmark in the history of magnetic recording, setting entirely new standards of quality, especially in the recording of music. Whiile complex in concept, it is surprisingly simple in operation. It actually reduces the problems of the recording engineer while vastly improving the results.



Three different models of the 3M Professional Mastering System are available. Specifications and operating instructions apply basically to all three, as the only difference is in the number of tracks recorded and the number of electronic assemblies. Model #1 is a single channel, 2-track monophonic recorder using standard 1/4" tape. Model #2 is a 2-channel, 4-track stereophonic recorder using 1/2" tape. Model #3 is a 3-channel, 6-track recorder for recording multi -channel stereophonic or stereo and monophonic signals simultaneously. Model #1 or #2 can be easily converted to record additional channels.

´╗┐Foundational text courtesy of Revere-Minicom Division 3M Company.



"The original Dynatrack-only machines (only 6 were delivered to customers) used 2 70 mil tracks per channel.  A stereo machine was 1/2" 4-track, and a 3 channel machine was 3/4" 6-track.  In 1964, when these machines were delivered, 3-channel was very common and overdubbing wasn't too common.

By the time we started delivering the M23 version, which was normal NAB with the capability of converting to Dynatrack, 1" 8-track and overdubbing were the norm for rock and roll.  Things progressed very quickly for tape recorders and consoles at that time.  We went from basic 4-track to 24-track in less than 10 years!" -Dale Manquen at MANCO 




3M Professional Mastering System

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I've had this catalogue since 1980. Has anyone ever seen one of these machines? Were these ever in production or did they become prototypes for the M23? …

The Dynatrack Machines Not rated yet
These Dynatrack-only machines used two tape tracks to record each audio channel. One track of the pair was a normal NAB-standards track, but the other …

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