

The Proton Envelope Filter by 3Leaf Audio is a modern homage to the classic Mutron III envelope filter. It features a wide frequency response that works well with various instruments. The version 3 of the Proton has increased input sensitivity to better accommodate low-output instruments. Additionally, it includes a tone knob for variable control over the filter cutoff frequency.
Technical Specifications:
- Power: 9V DC, 25mA minimum
- Power Connector: 2.1mm center-negative (Boss-style) plug
- Warranty: Guaranteed against defects for one year, covering normal use
- Bypass: Relay-based silent true bypass that automatically switches to
bypass mode if power is lost
Key Features and Controls:
- Decay: Controls the time it takes for the filter to sweep
- Tone: Adjusts the maximum cutoff frequency of the filter
- Sweep: Determines the direction of the filter's sweep
- Peak: Controls the "wetness" of the filter sound
- Gain: Adjusts the response of the filter to playing dynamics
The Proton Envelope Filter offers a redesigned circuit for better tone and a more musical response, making it a versatile and dynamic tool for creating funky envelope filter effects.
Watch the latest video demos and reviews for the Proton Envelope Filter from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.
Below are live Reverb listings for the 3Leaf Audio Proton Envelope Filter from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.
Very Good
$375
Very Good
$410
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