Piezoelectric stereo telephones "TPS-2".
Headphones, headphones, headsets ...Piezoelectric stereophonic telephones "TPS-2" have been produced presumably since 1987. Stereo telephones are designed for high quality individual listening to mono and stereo phonograms. The operating frequency range is 20 ... 20,000 Hz. The nominal electric capacity is 50,000 pF. Nominal input voltage 3 V. The coefficient of nonlinear distortion is less than 1%. The weight of piezoelectric stereo phones is 280 grams.