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Since 1972, the subscriber radio Ob-2 has been producing the Novosibirsk plant of low-voltage equipment. Subscriber loudspeaker '' Ob-2 '' is designed to work in a radio broadcasting network with a voltage of 30 V. The frequency range of 160 ... 5000 Hz. The average sound pressure of 0.25 Pa. Loudspeaker dimensions - 192x192x65 mm. Weight 850 gr. Price 5 rubles.