There’s a Reddit thread of the mofeta where John the designer of the circuit mentions c8 is wrong in the build doc compared to his circuit. And it should be 270pf not 680pf. He mentions it as a way to make lower gain tones not as muddy. He designed it so I trust him. He also mentions a couple...
I’ve recently built a mofeta preamp. I’ve done the C8 mod John from eae suggested. Replacing the LPF C8 from 680pf to 270pf. But my build has either way too much low end or an attenuated high end. Everything works. The eq sweeps a decent amount for all bands but doesn’t overcome the massive low...