Hello everyone.
I assembled a small passive HPF CR first order filter
The FMR developers specify that the SChain resistance is 20 kOm. Simple calculations and scheme is done. Experience specify that low cutoff values do not work well (because first order is 6 dB to octave).
Summary cap values and switch positions:
- Virtual Bypass (SCchain is disabled)
- Full range
- 360 Hz Cutoff
- 800 Hz Cutoff
- 1170 Hz Cutoff
P.s. Knob will be replaced
