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Since 1965 the subscriber loudspeaker Dziesma has been producing the Daugavpils enterprise OC-78/3. "Dziesma" - subscriber loudspeaker with increased due to the large wooden case and increased input power sound quality. In AG applied 1GD-6 loudspeaker. The input voltage is 30 V. The input resistance is 6000 ohms. The power supplied from the radio link is 0.25 W. The average sound pressure is 0.28 n / m2. The range of reproducible sound frequencies is 160 ... 5000 Hz. Subscriber loudspeaker dimensions - 270x162x90 mm. Weight not more than 1150 gr.