This is the circuit diagram of Electro-Harmonix Soul Preacher pedal.
Notes:
-All resistors are carbon film, 1/4W, 5%, unless otherwise noted
-All non-polarized capacitors are mylar, 50V, 10%, unless otherwise noted
-Transistors Q1-4 and FET J1 are unknown
-IC1 is a 4558
Download Electro-Harmonix Soul Preacher pedal circuit diagram in PDF file:
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