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Orthodynamic stereo headphones "ECHO" (H-16) were produced since 1992 by the Kiev factory "Quantum".
Designed for high-quality listening to sound phonograms.
Headphones were produced with winding resistance of 16, 40 and 100 Ohms.
The nominal range of reproducible frequencies is 20 ... 20,000 Hz.
Rated input power 1 mW.
Passport power 750 mW.
The sound pressure level when summing the rated power is not less than 91 dB.
The unevenness of the frequency response is not more than 16 dB.
The total harmonic coefficient is 0.3%.
Dimensions of headphones 220x170x68 mm.
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