Audio Circuit using IC1 NE5534 and TR 2SK135, 2SJ50

Audio amplifier circuit using NE5534 and FET
Part Audio Circuit :
R1 33 kΩ C1 1nF 63V D1 1N967B zener 18V 0.5W
R2 6.8 kΩ C2 47 µF 40V D2 1N967B zener 18V 0.5W
R3 22 kΩ C3 100 nF 63V D3 1N4148
R4 100 kΩ C4 100 nF 63V D4 1N4148
R5 1 kΩ C5 47 µF 40V Q1 2SK135
R6 330 Ω C6 4.7 pF Q2 2SJ50
R7 1 kΩ C7 100 µF 40V IC1 NE5534
R8 10 kΩ C8 100 µF 40V
R9 0.47 Ω 2W
R10 0.47 Ω 2W
R11 10 kΩ