Headphones impedance : 8-600 Ohms
Input impedance: 100 Kilo-Ohms
Frequency response: 15 Hz - 40 KHz, -3dB
Power output > 1 watt
Signal/Noise: 93 dB
THD: <= 0.3%
Voltage: AC 110/220 V, 50/60 Hz
External dimension (each unit): 6"(H), 5½(W), 13"(D)
Weight: AMP 12 lbs, PSU 10 lbs