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Since 1978, the subscriber loudspeaker "Ob-304" has been producing the Novosibirsk plant of low-voltage equipment.
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AG "Ob-304" was produced together with the "Ob-303" model to increase the range of items.
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The loudspeaker is designed to operate in a radio broadcasting network with a voltage of 30 volts (or 15 volts for Moscow).
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Power input 0.15 W.
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The range of reproducible sound frequencies is 200 ... 6000 Hz.
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Average sound pressure in the frequency range 315 ... 4000 Hz is not less than 0.25 Pa.
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Dimensions of the subscriber loudspeaker 192x192x65 mm.
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Weight 850 grams.
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