Echo-M portable transistor electric megaphone.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesThe Echo-M portable transistor electric megaphone has been produced by the Kharkiv Radiodetal plant since the 1st quarter of 1984. The Echo-M electromegaphone is designed to amplify speech within a radius of up to 10 meters. It can be used by tour guides, trainers and bus drivers. The electric megaphone consists of a transistor amplifier, a loudspeaker and batteries placed in a plastic case, as well as an external microphone plugged into the connector. The electric megaphone has a range of audio frequencies when working with a DEMSh-1 microphone - 300..3000 Hz, the electric megaphone itself reproduces a band from the input - 200 ... 8000 Hz, and from an external speaker - 80 ... 12500 Hz. Rated output power 0.5 W. The electric megaphone is powered by 3 flat batteries with a total voltage of 12 volts.
