Control Schematic amplifier for head phone op-50

 Schematic amplifier

Performance of the circuit: (Vout = 6Vrms, R1=4k©)

T.H.D @ 100HZ = 0.0025%
@ 1KHZ = 0.003%
@ 10KHZ = 0.011%
Relationship sign noise p5; 80dB
answer = ±0.4dB from 10Hz to 20Khz
Band with = -3dB @ 56KHz