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Subscriber loudspeaker "Surprise" from the beginning of 1965 to 1977 produced the Novosibirsk plant of low-voltage equipment. Subscriber 'Surprise' loudspeaker is designed to receive broadcasting programs transmitted over broadcasting networks. The audio frequency range is 150 ... 5000 Hz. The power input is 0.15 watts. AG dimensions - 245x140x55 mm. Weight 1.1 kg. AG "Surprise" were produced with a slight difference in appearance, invoice grille, volume control knob. According to the same case design and similar design of the front panel, various factories in the country produced subscriber speakers Sozh, Taiga-4, Moskvich and others.