Note that the resistor R1 serves as the polarization of the two transistors Q1 and Q2. At the same time, the transistor input matching has become an NPN.
Parts list :
R1 : 470
R3 : 82K
R4 : 1K
R5 : 1K5
C1 : 47uF
C2 : 22uF
C3 : 100uF
C4 : 56pF
Q1, Q2 : BC109
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