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The subscriber loudspeaker "SG-1" (Siberia) has been produced since 1950.
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The subscriber loudspeaker "SG-1" (Rural loudspeaker - 1) differs from all the others in its labyrinth design.
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Due to this, the sensitivity of the loudspeaker is increased and a power input of 40 mW is required for normal operation, whereas a power of 150 ... 250 mW is required for conventional subscriber loudspeakers.
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The loudspeaker "SG-1" is designed for a voltage in a radio line of 30 V. The operating frequency range is 200 ... 5000 Hz.
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Uneven frequency response 20 dB.
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Average sound pressure 3.2 bar.
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Harmonic distortion 15%.
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Loudspeaker type 1GD-1.
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