TECHNICAL SPECIFICATIONS
Electrodynamic headphones
Freq Response: 10-20.000 hz,
Unmeasurable distortion: 100 dB,
Voice coil: 25 mmm,
2 potentiometers for channel power,
Max power: 100 w,
Weight: 620 g.
know that may have to replace hp coils
by those headphone Koss R80, same diameter
and even design, very similar characteristics