This is the third iteration of my bandpass filter - if you know it, you know it, but it's a great way to put some dirt and squall into your sound whilst taking up very little space.
There are a couple of differences over the previous version(s): first, I've switched to a JST-style power connector which takes up far less space than the usual 2x5 pin job (you'll get an adapter board - don't worry) but there's also a second, two-pin connector which you can use to connect to a modulation source or maybe an exponential convreter in order to achieve some approximation of voltage control - granted, you'll need some sort of additional module to do this but there's only a finite amount of stuff you can get into 2HP, even with a small power connector.
