How to connect R4 R5

Users questions: Will the old masters, as shown: R4 R5 should be connected to what position, I do not understand, Please advise.
Experts answer:R5 adjust the volume should be a sliding resistance, sliding head and back should be the power amplifier circuit, R3 and potentiometer R4, C10, C11 compensation together constitute the audio response Circuit. Compensation frequency, R5 sliding resistance in the middle of a tap, R4 should be connected to the tap on.
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