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The special reel-to-reel tape recorder "Sound-1" has been produced since 1967. The stationary coil-type tube recorder Sound-1 (M-64) is designed for high-quality recording and playback of sound phonograms. The device is assembled in a metal case has 5 speeds of pulling the magnetic tape: 9.53; May 19; 28.0; 38.1 and 76.2 cm / sec. There is an additional capstan attachment for an additional increase in speeds. The tape recorder has 4 magnetic heads; recording, erasing and two reproducing, in order to listen to the recorded program during recording. There are three engines on the tape recorder: the DM-3 master, the left and right DPN-1. There are lamps in the recorder: 6p1p, 6n6p, 6n3p (5 pieces). To cool the circuit elements installed fan G-31A. If necessary installation of the ring cartridge is possible. The range of recorded and reproducible frequencies at the lowest speed is 100 ... 5000 Hz, at the highest 100 ... 12000 Hz, using the nozzle (152.4 cm / sec) 100 ... 14000 Hz. It comes with a wired remote control with a relay unit that allows you to control all the modes of the device at a distance of up to 20 m. The mass of the device is 48 kg.