The entire circuit without gain,Base on Musical Fidelity X-10D
Using classic triode amplifier circuit,The entire circuit without gain
The Output using the deep negative feedback circuit,distortion reach to 0.008%.frequency response reach to 10HZ-100KHZ,Output impedance is dropped to 200ohm.
12AU7 tube,In Class A station the voice effection is best.
Joined the independent power supply filter,Make the background more quiet, higher signal-to-noise ratio