Dub Filter

Dub Filter by AudioThing recreates the legendary Altec 9069B high-pass filter—the ‘Big Knob’ that shaped King Tubby’s dub sound. This plugin gives you a stepped high-pass filter with eleven frequency points from 70Hz to 7.5kHz, plus an Impedance control for resonance. Beyond the original circuit, three non-linear controls let you shape the character: Magnetism adjusts harmonic content and slope, Character dials in saturation, and Dynamics smooths the frequency response, even pushing it into envelope-filter territory. Two modulation sources—an LFO with multiple waveforms and an envelope follower—open up rhythmic sweeps and organic filter movement. Perfect for dub, reggae, electronic and experimental producers looking to add vintage warmth, movement and character to drums, bass, synths or full mixes. It runs on Windows and macOS in all major DAWs.