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3Leaf Audio - Proton envelope filter V3

A modern homage to the classic Mutron III envelope filter

Lieferzeit: Nicht auf Lager

259,00 €
Inkl. 19% MwSt., zzgl. Versandkosten

A modern homage to the classic Mutron III envelope filter

New features for v3:

Tone knob for fine control over the filter sweep.

Increased sensitivity range for better compatibility with low-output instruments.

Phase-correct output for predictable use in blend pedal signal chains.

Footprint: 64 x 118 mm

The Proton is a dynamic envelope filter tuned to evoke the vibe of the classic Mutron III. It is highly touch-sensitive and has a full-range output that sounds great on any instrument.

A simple control layout makes it easy to dial in everything from smooth and subtle to wet and juicy. The gain knob controls the sensitivity of the envelope detector circuit. The peak knob controls the resonance, or 'wetness' of the filter sweep. There are range and sweep sweep direction switches, and a decay speed knob that allows fine control over the speed of the filter.

The Proton comes in a custom steel enclosure and features a soft-touch relay true bypass system that automatically switches to bypass in the event of a power failure.


Use a 9-18v DC power supply with a 2.1 center-negative (Boss-style) plug (not included). The Proton will draw up to 25mA of current. The Proton is protected internally against AC and reverse polarity supplies. Don’t use more than 18 volts!

Gain Controls how sensitive the filter is to your playing dynamics.

If the gain control is all the way counter clockwise,

the filter won’t open at all. Start there and turn it

up until you reach the desired tone and response. The

gain control is very powerful; where it is set will affect

the filter’s attack and decay speeds, as well as the overall


Peak Controls the resonance, or wetness, of the filter. Everything

up to 12 o’ clock is on the subtle side. For the classic

70’s filter sound, set it between 12 and 3 o’ clock.

Anything past 3 o’ clock is extra juicy and contains

harsh resonant peaks, so use caution.

Range Controls the frequency range of the filter sweep. The up

position is a brighter, more focused sound. The down

position is a thick, juicy sound with a deep sweep

Decay The speed the filter closes as your note decays. Set

around 3 o’clock for a Mutron-like decay. Set around 12

o’clock for a faster, more bubbly decay that grabs every


SweepControls the direction of the filter’s sweep. In the up

position, the filter sweeps normally. In the down position,

the sweep is reversed. You may find that the down

sweep works best with the gain control cranked up a bit.

WARNING: In certain settings, the Proton can put out very loud resonant peaks that can blow speakers.

This is especially true if you crank up the peak control and set the range and sweep switches to the down

position. Use caution and start with your amp volume low when dialing in your settings.


Marke 3leafaudio


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  • Bewertung
    Spektakuläres Filter-Pedal. Da ...
    Kundenmeinung von Boris Beutelmann(on 23.06.2014)
    Spektakuläres Filter-Pedal. Damit lassen sich die geilsten Funk-Sounds einstellen, ..und Jazz-Tones.....und viel viel mehr. Kein Klangverlust, kein Brummen. Superinnovative Bedienung. dank gut durchdachter Bedienungselemente. Alles wies sein muss. Das Pedal macht mir jeden Tag mehr Spass.