Multi-feedback resonant bandpass filter (2HP - FR4 or Perspex panel)
My original bandpass filter, reimagined in 2HP.
This isn't a voltage-controlled behemoth - eagle-eyed viewers will notice three pots: the top one controls the amount of current going into the filter; you'll notice it's effect most with harmonic-rich signals, whereas in other cases it'll provide a bit of attenuation - the setting will affect the amount of resonance, up to a point, but for most practical purposes it's a set-and-forget affair.
The other two pots are your more traditional cutoff and resonance - with the resonance cranked up the filter is extremely capable of self-oscillation and face-shredding feedback, whereas at more modest settings it'll add a nice bit of depth to your sounds.
Supplied with a 2HP panel made from 3mm laser-cut and engraved perspex or 1.6mm FR4 (PCB material).
Mounting screws and a power cable are also provided.