Caline CP-16 Mark 4 Distortion [emulate a Rectifier Mesa Boogie Mark IV] Guitar Effect Pedal, 2013, made in China

 

Link: tagboardeffects | schematic | effectslayouts

... also tried some different IC's, OPA 2134, OPA 2604, RC 4558P, JRC 4580, NE 5532 and LM 833. All of them sounds good with a little different in gain. The best result I got with the JRC 4558D (original) and the OPA 2604 (this sounds a little bit more HiFi).

Distortion pedal supposed to emulate a Rectifier Mesa Boogie Mark IV.

Everything is analog, with a real true bypass.

- Gain1 increases treble distortion,adjust the former level of distortion

- Gain2 controls the amount of bass distortion, adjust the saturation level of distortion

- Level：Adjusts the output level