Dr Scientist Dusk (Analog Low Pass Filter) - YouTube
Genzler re/Q Dual Function EQ Pedal | Bass Buddha
Pigtronix Introduces the Resotron Analog Filter Pedal – No Treble
Behringer BM-101, Filter-Pedal mit MIDI - AMAZONA.de
Dr. Scientist Dusk Multi Mode Low Pass Filter - Pedal of the Day
ilovefuzz.com • View topic - Low-pass filter in a pedal?
NPD - Broughton Low + High Pass Filter. Does a great job of cleaning up muddy low end and hissy high end frequencies I don't want. Just the creamy middle! : r/BassGuitar