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Subscriber loudspeaker "Cheremshina-310" presumably since 1982 produced Lviv software named after the 50th anniversary of the October Revolution (previously it was the Lviv Telegraph Equipment Plant). The subscriber loudspeaker `` Cheremshina-310 '' is designed to reproduce a low-frequency program transmitted over local wired networks with a voltage of 30 V. The model uses a 1GD-30 loudspeaker and a small-sized transient transformer. Rated input power - 0.15 watts. The average sound pressure is 0.25 Pa. The range of working sound frequencies is 160 ... 5000 Hz. THD - 8%. Input impedance 3.6 kOhm. The dimensions of the loudspeaker are 250x166x78 mm. Weight - 1.5 kg. Retail price - 5 rubles.