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The Jupiter-001-stereo, Jupiter-002-stereo and Jupiter-003-stereo tape recorders were developed in 1972 by the Mayak plant in Kiev. The devices of the highest class are built according to the functional block principle on the basis of unified three-engine LPMs with auto-stops, tape consumption counters, and wireless remote control. The speeds of the magnetic tape are 9.53 and 19.05 cm / s, the detonation coefficient is 0.1%. In all devices there are pointer indicators of the recording level with backlighting, slide volume controls and recording levels, there is the possibility of synchronous recording from different inputs. MPs work on external control centers with speakers. The ranges of operating frequencies at the output to UCU at a speed of 9.53 cm / s - 31.5 ... 16000 Hz, 19.05 cm / s - 31.5 ... 2000 Hz. In the prefix "Jupiter-001-stereo" there is an automatic reverse, and in the prefix "Jupiter-003-stereo" the possibility of reproducing quadratic phonograms is provided. From the autumn of 1973, with a revision and simplification, only one device was launched into mass production, the Jupiter-001-stereo, but under the name Mayak-001-stereo.