1 2 3 4 5 +V CC -VCC U3 LM 1875 2 3 1 8 4 U1A NE5532 2 3 1 8 4U2A NE5532 R11 100K R10 47K R9 1K R1 1K R3 1.8K R12 1.8K R14 8.2K R4 8.2K R13 10K R6 1K R2A 50K C5 2200P 1 1 2 2 W 3 R5A 50K C6 47nF C1 47nF C4 220P -15V +15V 1 1 2 2 W 3R7A 100K C2 1uF C3 220pF R8 10K R15 1K R17 10K R16 33K R19 220 R18 10 C7 0.1uF R20 0.33/2W +V CC -VCC LS 1 SPEAKE R 1 2 3 4 5 +V CC -VCC U4 LM 1875 6 5 7 U1B NE5532 6 5