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Since the beginning of 1965, the subscriber loudspeaker Signal has produced the Novosibirsk plant of low-voltage equipment. Subscriber loudspeaker '' Signal '' is standard according to GOST 5961-59. It is designed for the sound of radio programs transmitted over radio broadcasting networks with a voltage of 30 volts. Rated power supplied to the AG of 0.15 watts. The range of effectively reproduced sound frequencies is 150 ... 5000 Hz. Resistance at the terminals of the plug included in the line 6 kΩ. Dimensions of the receiver 240x140x80 mm. Weight 750 grams.