Portable electric megaphone "Echo".

Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesSince 1974, the portable electric megaphone "Echo" has been produced by the Kharkov plant "Radiodetal". The electric megaphone is designed to amplify speech within a radius of up to 10 meters and can be used by tour guides, coaches, bus drivers and for other purposes. The electric megaphone consists of a microphone, a transistor amplifier, a loudspeaker, and batteries in a plastic case. The electric megaphone reproduces the audio frequency band 200 ... 5000 Hz. Its rated output power is 0.5W. It is powered by two flat batteries. The dimensions of the electric megaphone are 190x100x60 mm. Its weight is 1 kg.