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The "Sirius EF-330S" electrophone has been produced since 1991 by the Izhevsk radio factory. The network stationary stereophonic "Sirius EF-330S" is intended for playing stereo and monophonic sound recordings from records of all formats, as well as for amplifying sound programs from external sources and playing them through acoustic systems of the microphone. Rated output power 2x6 watts. Short-term maximum output power 2x12 watts. The effective range of reproducible frequencies on an LV is no longer 50 ... 14000 Hz, in fact 20 ... 25000 Hz. The band of reproduced frequencies of the acoustic system by sound pressure is no longer 50 ... 12500 Hz. The detonation coefficient of EPU is about 0.25%.