• OP amplifier circuit for inversion and amplification＋Discrete diamond buffer circuit.
  • Improvement of feeling of normal position in the head by cross-feed circuit.(Invalidation by jumper settings)
  • Setting high/low of the headphones impedance by jumper.




Input impedance
10k-ohm

Recommended headphone impedance
3-ohm to 600-ohm
Note:When the headphone impedance is between 16-ohm and 200-ohm, please use HIGH mode of the output impedance change (SEL3) for max power restrictions.

Rated output
*250mW+250mW (33Ω burden)
 20Hz to 20KHz THD+N=under1% Ro=14.7-ohm (Output impedance HIGH)
 Source voltage +/-12V
*150mW+150mW (330-ohm burden)
 20Hz to 20KHz THD+N=less than 0.1% Ro=4.7-ohm (Output impedance HIGH)
 Source voltage +/-12V

Frequency characteristic
more than 5Hz to 100kHz

Residual noise
less than 10μV

Source voltage
between +/-5V and +/-15V

Voltage gain
0dB (It is modifiable by R3,R4)