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Since 1973, the reel-to-reel tape recorder Yauza-212 produced the Moscow EMZ No. 1. The tape recorder is radically different from previous models. LSM is made on a single-motor scheme, using an electric motor-transformer ADT. The presence of a through channel made it possible to obtain: dubbing of phonograms from track to track, recording to one of the tracks and at the same time playing from another track, recording with the effect of "echo" and others. A comparative control is also a significant convenience of during the recording process, monitor the already recorded signal by ear. The tape recorder has speeds of 9.53 and 4.76 cm / s. Knock factor 0.3 and 0.4%. When using coils on a 525 m magnetic tape with a thickness of 37 μm, the recording time is 6 hours at a higher speed and 12 hours at a shorter one. Nominal output power, when operating on two built-in 1GD-40R loudspeakers, is 2 W, and when connecting an external speaker with an impedance of 8 ohm, 5 W. The operating frequency range is 40 ... 12500 Hz at higher speeds and 63 ... 6300 Hz at lower speeds. The relative interference level of the playback channel is -44 dB and the through channel -42 dB. Power consumption 50 watts. The dimensions of the tape recorder are 415x365x160 mm, weight 11.5 kg.