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Since 1967 the subscriber loudspeaker "Rhythm" has been producing the Moscow plant of electrical equipment. "Rhythm" is a standard subscriber loudspeaker designed for a broadcasting radio network with a line voltage of 30 V. The nominal input power is 0.15 W. The range of reproduced frequencies by sound pressure is 160 ... 5000 Hz. Input impedance is 3.6 kΩ. Distortion factor of 8%. The dimensions of the loudspeaker are 260x150x65 mm. Its weight is 1 kg.