Portable electric megaphone '' Balsas-2 ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesSince 1973, the portable electric megaphone "Balsas-2" has been produced by the Panevezys Electrotechnical Plant, Lithuania. Electric megaphone "Balsas-2" is designed to amplify speech in a radius of up to 7 ... 10 meters and can be used by guides, trainers, bus drivers. The electric megaphone consists of a microphone, a transistor amplifier, a loudspeaker and a power supply located in a common plastic case. Microphone DEMSH-1A, loudspeaker type 2GD-3. The amplifier and speakers reproduce a frequency band of 90 ... 8000 Hz, from a microphone 300 ... 3000 Hz. The nominal output power of the electric megaphone is 1 W.
