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3Leaf Audio Proton Envelope Filter

3Leaf Audio

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3Leaf Audio Proton Envelope Filter

The Mutron III envelope filter was a staple of 1970′s funk and soul music that shaped the sounds of Bootsy Collins, Stevie Wonder and Jerry Garcia among others. But as good as the Mutron sounded, it was not without its problems. It was huge and required a special power supply, and it had a sensitivity control that changed your volume when you kicked it on. Then there’s the price – originals routinely fetch $500  or more on eBay!

The new Proton envelope filter contains the essence of what made the old Mutron sound so good, without all of the drawbacks of the original. It’s small, it runs on a standard 9-18v DC power supply (no battery), and it won’t change your volume when you kick it on. But most importantly, it sounds FUNKY. With its simple control layout, you can easily dial in the slurpy, wet filter sounds of the original. Set the sensitivity with the GAIN control and the resonance with the PEAK control, and you’re good to go! It also features high and low range positions, lowpass and bandpass modes, and a sweep reverse. It has a wide sensitivity range that will drive active or passive instruments, and the filter range is such that it will sound great on guitar, bass, and whatever else you can throw at it.

Note: the Proton does not come with a power supply. It is compatible with any standard 9-18v center-negative supply (“Boss-style”).

The 3Leaf Audio Proton Envelope Filter is smooth and funky.  The Proton filter is perfect for vintage quack or synthy sweeps.  The Proton filter is extremely responsive and smooth.  Avoid the eBay markup and get your Mutron on today with the 3Leaf Audio Proton Envelope Filter.

The musicians at 3 Leaf Audio always fancied the sound of the Mu-Tron III, but as far as attainability for the modern musician goes, the Mu-Tron was quite out of reach. So the 3 Leaf Audio Proton was born, as a modernized take on the original Mu-Tron III design, ridding it of tone suck, volume drop and making the 3 Leaf Audio Proton affordable for musicians everywhere. The 3 Leaf Audio Proton features gain and peak knobs, along with 3 switches for sweep reversal, range, and low or bandpass making your envelope filter experience tweakable as ever, with the ability to bring you the classic slurpy wet tone you've always dreamed of.

NEW VERSION: It has the same sound as the original, but adds a decay knob for fine tuning of the filter's speed. It also utilizes my relay true bypass system for bulletproof switching, and it comes in my new custom-designed steel enclosure.

3Leaf Audio Proton Envelope Filter Features:

  • No volume drop
  • Simple control layout
  • Lowpass and bandpass modes
  • 9 Volt operation
  • Rugged construction
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Product Reviews

Showing reviews 1-10 of 19 | Next

  1. Great filter and Easy to Dial In

    Posted by J. Lindquist on 5th Jun 2014

    I've had more than a handful of envelope filter/autowah pedals over the last years. I have FINALLY found THE pedal.

    Other than sounding great, the pedal is easy to dial in, has the up and down sweeps (that I personally like and use), and doesn't take up much pedalboard space. It's also built like a tank and has quiet switching.

    I like how the decay sounds on this pedal compared to other pedals with decay knobs. No weird "after effects". (I don't know how else to describe it. It's that weird sound like the effect wants to try the effect again for shorter durations. I don't like it.)

    The ONLY wish that I had for the 3leaf pedals is that they'd use non-plastic jacks. This is the second pedal from them that I own, and both have these type of jacks. I haven't broken one, but they concern me.

    Again, I HIGHLY recommend this pedal. It sounds great with a clean sound, or running into my plethora of OD/Distortion pedals.

    Keep it up 3Leaf Audio!!

  2. Big sound from a small box!

    Posted by Wu on 15th May 2014

    I use this with bass. 3leaf squeezed the classic vintage Mutron sounds into a small box with standard 9 volt power. Job well done. Plays well with dirt and octaver, This is not one of those quacky wah wah imitators. It is a gritty funky envelope filter.It does not have a useless arpeggiator and gimmicks that soon become redundant. Inspiring tones where you control the groove. Great construction and looks. Prymaxe pricing, service and shipping are great.

  3. Perfect for that Garcia sound!

    Posted by Unknown on 3rd Jan 2014

    I've always loved the Jerry Garcia Auto-Wah sound, but could never dial it in with other envelope filters (they all sounded weak or flat to me). I heard someone using this pedal and thought it nailed the sound and many other cool Stevie Wonder sounds too. Very easy to use and yet it has quite a few options to tweak. The on/off switch is surprising easy to click on vs some other boutique pedals that require a heavy stomp! Highly recommend. Thanks to Prymax for amazing products at great prices.

  4. great filter

    Posted by Unknown on 27th Dec 2013

    The proton is an excellent envelope filter that absolutely the nails the sounds of vintage 70s filters like the Mutron. The pedal will easily give you that Jerry Garcia sound and is great for funky rhythm as well as lead work. With few knobs it is easy to dial in the great sound you are looking for!

  5. Exactly what I was looking for

    Posted by Unknown on 14th Dec 2013

    I have always been a fan of the sound Jerry Garcia was able to get with the Mutron. I was always on the lookout for a decent copy but was never able to find one. Over the years I sort of gave up on it until I stumbled upon this pedal. I love the fact that it was not a big box like the Q-tron and would fit nicely on my pedal board. The build quality is very good and knobs are laid out well and solid.

    To be honest, when I first tried it, I could not get it to sound anything like Jerry Garcia's sound. I was getting all kinds of cool envelope filter type sounds but no Jerry. I scratched my head a bit and tried some different settings and "eurika!" there it was. Exactly the sound I was looking for. Does the Jerry sound very well and is very responsive to your picking dynamics. The filter responds to your picking attack and becomes very musical when you find the sweet spot. The more I have practiced with it the more I am able to trigger the filter exactly the way I want to adding a great dynamic to my playing.

    I am very happy with this pedal.

  6. Awesome Pedal, Quiet, Very Musical!

    Posted by Kevin on 8th Aug 2013

    I bought the pedal to use in a jam band to sound like Jerry Garcia. Does that very well! Also useful for funky wah chords. Really easy to get good useful sounds from this little guy. I really like the switch, I had to get used to it because it does not click. This pedal does not make the volume go up or down, nor does it add noise. I have tried it before and after a compressor and both ways worked. Really opens up according to your picking style. Runs on boss power supply. Really can think of nothing wrong with this pedal. Used it at practice last night, I was worried it would be too over the top, but it is very useful and musical. I really don't want to be a guitarist with more pedals than chops, but this pedal is a great addition to even a modest pedal board. I only used an overdrive, comp, volume pedal, and a tuner before. This is the only mod/wah pedal I can see needing. Now that I have this one, I am craving the Wonderlove, 3Leaf Audio is the real deal! Dont worry about the "plastic" jacks. They are very high quality and have not caused any problems from what I have read online.

  7. Solid Envelop Filter, right size

    Posted by Rich on 5th Aug 2013

    This is my first envelop filter, finding it very useful for funk type songs where the wah wasn't quite right - Superstition, Brick House, etc. Like the previous reviewers have said -- it's well built, great switching, and very versatile. I would recommend the pedal, but dont have any other filter to compare it to.

  8. Great pedal, Great Price and Great Service!

    Posted by Jim Christaldi on 12th Jun 2013

    First of all, I would like to begin with the pedal. I have been using my Boss envelope filter, the T-Wah, for the last 30 years. And though I love my vintage Boss pedals and this one has served me well for all those years, years that saw intensive playing out too, I felt that there must be something better out there. As I do cover a lot of Grateful Dead music, I always felt that the Boss was just falling short of what I needed to TRY to get Jerry's tone better. Well, this pedal is blowing me away, as well as my bandmates! What a difference! As soon as I started to play through it, I was shocked at the huge difference. This pedal has that sound and it just has a much warmer tone altogether. THANK YOU 3 LEAF AUDIO!!!! I had begun to not want to even use the envelope filter, now with this new pedal, I have to force myself NOT to use it too much! I could go on and on, and as I use it more (recently got it), I am sure I will want to do that too!

    Now let me talk about Prymaxe . . . I was not aware of this company at all. I started looking at the 3 Leaf Audio site and this company was one of the companies that were listed as carrying the pedal. I tried a few of them, some didn't have the pedal in stock, others had the expected price of $199.00. I tried Prymaxe and a very nice, knowledgeable guy answered the phone (I SUCK with names). Not only did he have it in stock, but he also offered up a discount that no one else was offering. He was very helpful and the pedal was shipped to me VERY fast and well packed. I was impressed with the LARGE assortment of Boutique pedals that these guys have in stock too! Finding this company could be a bad thing for my wallet and a great thing for my sound! Not that there prices are bad (see above), but they have so many damn tempting pedals to dangle in front of me!

    i would buy from these guys in a heart beat again and I also now need to see what else 3 Leaf Clover might have in their line to tempt me more and improve my sound.

    Thanks again to both 3 Leaf Audio and Prymaxe!!!

  9. Proton Filter – The best out there! GET FUNKY

    Posted by Unknown on 11th Jun 2013

    First my reservations before buying the proton
    I was always apprehensive about;

    1. about an auto wah (I already own RMc3FL WAH) until I met the Proton. The sensitivity knob is really SENSITIVE. Try ans see you will what I mean. Sometime you dont need too much of WAH, just a hint maybe ...but sometime during solos you may want to get funky ....just hammer the strings and you are there. Basically the Proton allows you to encompass those different moods.

    2. You could be forgiven if you thought that with so many knobies , that the Proton was had to dial in. I thought the same. But in reality its the easy to dial in the sounds you want. Probably they should have named the knobies better ;). For example in layman terms the Range knob is nothing but a Bright/Boom toggle. Sweep is nothing but Normal/reverse sweep. Think of Decay as you fine tune knob.

    Some other things to like about the Proton

    Rock solid enclosure

    Quiet switching

    Really voiced well. I could hardly find a bad sound. You can use this as an ALWAYS ON pedal by setting the gain low , and you guitar volume at 7, whenever you are in mood pick hard and bring it on. This setting in conjunction with a highly sensitive OD like the Honeybee really brings euphoric dynamism to your playing .

    Final thoughts

    Does thesis replace a WAH pedal? Answer: No
    Does this pedal bring the world of funk to life? Answer: Yes
    Is this pedal a one trick pony? Answer: No (As mentioned above you can use it as an always on pedal and explore a brand new world of funk)

    If you love wah/funk/filter - A must buy!

  10. 3Leaf Audio Proton Envelope Filter

    Posted by ktorreg (giutarded) on 28th May 2013

    Fantastic pedal. World of posibilites. Thanks to 3Leaf Audio for taking the classic Motron and just making it better and finally accessable to the rest of us who didn't have one in the 70's but always wanted one, Well now is the chance.
    No pedal board should be without one

Showing reviews 1-10 of 19 | Next