Designed by Bob Moog himself in 1998, this lowpass filter packs the legendary ladder filter from his original modular synths into a pedalboard-friendly box, bringing that classic Moog warmth to anything you throw at it.
At its core is a fully analog 4-pole lowpass filter with cutoff sweeping from 20Hz to 12kHz, paired with adjustable resonance for everything from subtle tone shaping to screaming self-oscillation. Switch between 2-pole and 4-pole modes to dial in brighter or darker responses, while the envelope follower senses your input's dynamics—hit it harder and it opens up the filter automatically for alive, responsive sweeps. Six big knobs let you tweak cutoff, resonance, envelope amount, rate, mix, and sensitivity, plus 1/4-inch jacks for mono audio in/out and CV/expression pedal inputs on key parameters, so you can play it like an instrument. Housed in a sturdy black metal chassis about the size of a large pedal, it's built for both tabletop use and pedalboards, running on a 9V adapter with internal memory for saving up to 100 presets.
Over two decades, players have praised its fat, chewy analog tone on guitar, bass, synths, and even samples, calling it a staple for organic filter effects without digital artifacts. Some note it's bulky for tight boards and can get noisy at high resonance, but that just adds to its vintage character.
