1965 To 1982
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1965 – Music Center Incorporated is founded
1968 – JH-5 tape recorder is introduced
1970 – JH-10 MCI’s first tape transport with 16 tracks is produced
1972 – Introduces JH-400 the world’s first commercial in-line mixing console (1972-1977) – MCI tape AutoLocator (JH-45) similar to a remote control and could store a number of presets recalling particular positions on the recording track, a time saver in the overdubbing process. People with average technical skill could configure two JH-24 multi-track recorders for synchronized recording. This single product confounded the competitors who could not duplicate it at a reasonable price and gave MCI inroads to many recording studios.
1975 – JH-100 All DC transport with a DC capstan motor and DC motors for spooling. The DC transports maintain constant tension from the front of the reel to the back, eliminating the pitch and timing errors common to AC designs.
1976 – MCI becomes the first manufacturer to design a sound mixer with voltage controlled amplifiers (VCA) for mixing multiple channels (JH-500) costing a fraction of the price of flying Faders. The 500 Series had a more elaborate equalizer with two mid-band EQ sections, high and low pass filters, more sends, additional returns and plasma displays for VU indicators
1980 – JH-24 the successor to JH-16 Series using the same JH-114 transport and completely redesigned transformless electronics, with differential amplification for the line inputs & outputs and head coupling to improve the specifications (1980-1988)