Subscriber loudspeaker `` Ob ''.
Subscriber loudspeakers.DomesticThe subscriber loudspeaker "Ob" has been produced since the beginning of 1952 by the Novosibirsk plant of low-voltage equipment. AG "Ob" is designed to receive a local program transmitted over a radio network with a voltage of 30 V. The input impedance at the input is 4100 Ohm. Power consumption 55 mW. The range of reproducible sound frequencies is 150 ... 5000 Hz. Uneven frequency response - 12%. Average sound pressure 1.8 bar.
