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Since 2000, the M-555 subscriber loudspeaker has been produced by the Minsk Promsvyaz UE. Subscriber loudspeaker `` M-555 '' is intended for reproduction of programs of transfers of a low-frequency channel of a wire broadcasting network. According to the electro-acoustic and electrical parameters, the AG M-555 belongs to the 3rd group of complexity. The voltage in the radio network is 30 V. The range of reproduced frequencies is 160 ... 10000 Hz. Input impedance 4800 Ohms. The average sound pressure is 0.25 Pa. THD ~ 7%. The volume control range is 35 dB. Dimensions AH - 182x124x60 mm. Weight 800 gr.