Lehle DC-filter

A Modern Tool for Quieter Analog Rigs

In many analog setups, a small DC voltage component can sneak into the audio chain (pedals, effects loops, splitters, line equipment, etc.). This component is generally inaudible as long as everything remains "stable," but it becomes problematic during switching: true bypass, looper/switcher, A/B routing, loop changes, or device insertion. The result is well known both on stage and in the studio: a sharp and unpleasant noise that draws attention and gives the impression of a "poorly adjusted" rig.

The DC Filter addresses this exact weak point: it removes the DC voltage from the analog signal to limit these switching noises while preserving sound integrity. Designed as a passive filter, it easily integrates into various configurations without power supply requirements or settings to master.

Who Is It For, and In What Usage Contexts?

The DC Filter is aimed at all musicians and technicians seeking a cleaner audio chain: guitarists, bassists, keyboardists, synthesizer users, and sound engineers working with analog routing. It is particularly relevant if you use a looper/switcher, an A/B system, frequent loop changes, or if you have already noticed "pops" when activating an effect, a loop, or changing a signal path.

In live settings, it helps secure transitions, especially during quiet passages where the slightest switching noise is immediately noticeable. In the studio, it prevents ruining a take with an untimely click and facilitates work when doing insertions, reamping, or quick routing changes between multiple sources and effect chains. Its stereo operation also makes it natural in modern setups: wet/dry rigs, dual amps, stereo pedalboards, stereo keyboard outputs, or stereo effects returns.

Technical specifications

Effects	Noise Gate	Use	electric guitar
Technology	Analog	Color	Black
Format	Pedal