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Since 1929, the Pioneer subscriber loudspeaker has been producing the Kulakov Leningrad Electromechanical Plant.
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The design of the Pioneer subscriber loudspeaker is similar to the Record loudspeaker.
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The speaker device is simple.
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A fiber or paper diffuser is fixed at the base of the case and combined with an electromagnetic mechanism.
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A mechanical volume control is installed at the back of the speaker housing.
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