Subscriber loudspeaker "Surprise".

Subscriber loudspeakers.DomesticThe subscriber loudspeaker "Surprise", presumably since 1965, has been producing the Novosibirsk plant of low-voltage equipment. "Surprise" is designed to receive broadcasting programs transmitted over broadcast networks. Sound frequency range 150 ... 5000 Hz. Power input 0.15 W. The dimensions of the AG are 245x140x55 mm. Weight 1.1 kg. AG "Surprise" were produced with slight differences in appearance, overhead grille, volume control knob. Since 1978, the plant began producing a subscriber loudspeaker "Surprise-301", which was produced not according to GOST, but according to TU for operation in a radio line with a voltage of either 30 or 15 volts and had slightly different frequency characteristics, 160 ... 6300 Hz.