NEW Soviet Russian Isodynamic Headphones Electronika TDS-5M USSR Made

Description

Soviet copy of Japanese headphones YAMAHA HP-1, Type of transducer - orthodynamic (driver: a membrane with a sound coil located between two round magnets);
Frequency range: 20-20,000 Hz (± 2 / ± 3 dB);
Resistance at a frequency of 500 Hz - 100 Ohm;
THD- (94 dB, in the frequency range 100-3000 Hz) - 1%;
Weight - 290 g.