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Description
rocktron hex pedal SYNTHOTRON IIIA glorious all analog monophonic guitar Synthesizer with Filter, Sample and Hold and Analog Chorus. The Synthotron is an incredibly unique pedal. The term "unique" seems to get overused a lot in the world of pedals.. but the Synthotron III does things to your guitar sound that no other pedal can do. From the sublime to the ridiculous. So many sounds. So many options. So much fun. SYNTHESIZER SECTION 4 independent all analog voices with pitch and
A glorious all analog monophonic guitar Synthesizer with Filter, Sample and Hold and Analog Chorus.
The Synthotron is an incredibly unique pedal.
The term "unique" seems to get overused a lot in the world of pedals..... but the Synthotron III does things to your guitar sound that no other pedal can do.
From the sublime to the ridiculous. So many sounds. So many options. So much fun.
SYNTHESIZER SECTION
- 4 independent all analog voices with pitch and octave settings across them, determined by the top toggle switch on each of the four channels.
- Voice One toggle - Pitch 1 -(Yellow strip)= Unison, 1 octave up, 2 octaves up
- Voice Two Toggle - 8ve - (Orange strip) = References whichever note is being generated by Voice one and the generates either: 1 octave below, 2 octaves below or 3 octaves below
- Voice Three Toggle -Pitch 2 (Red strip) References note generated by Voice one and generates either: 1 octave below, p4 or p5 below, ma 2 or mi6 below
- Voice Four Toggle - 8ve - (Dark Red strip) = References whichever note is being generated by Voice three and the generates either: 1 octave below, 2 octaves below or 3 octaves below
- Decay and infinite sustain options - you can set each voice independently to have an incredible crisp, staccato feel, or a gentle decay
(You can set the duration of the decay independently on each channel) or set it to an infinite sustain - where the synth will lock onto the note you’re playing and will
only change pitch when you change the note on your guitar.
- Flux dial controls the “spring” or glissando between notes.
- Flux Toggle - right position engages the flux option. Left position disengages. Left position enables a staccato option with great tracking.
- Seperate Dry level control.
- External Dry out (so you can split the Synthotron III between two amps - one carrying clean signal, the other carrying synth.
- External CV in.
- External Trigger in.
FILTER SECTION
- Select between - Sample Hold Mode, Envelope Filter Mode and Manual Sweep Mode (via exp pedal).
- Velocity and Freq control the speed and frequency range of the filter
- External Exp jack for controlling frequency range with an external exp pedal when in expression pedal filter sweep mode.
- External Exp jack for controlling filter section LFO speed with an external exp pedal.
CHORUS SECTION
- All analog chorus section (based around the Empress Deus Chorus) - using a NOS MN3007 bucket brigade chip.
- Twin voice settings allow selection between a warm CE-1 styled chorus or a bright shimmery chorus
- Velocity controls the chorus speed
- Mix controls the blend of wet and dry signal
- Depth controls the depth of the chorus effect
SUMMARY
Each of the three effects in the Synthotron III (Synth, Filter, Chorus) can be used independently or simultaneously. Three incredible, ultra dial-able analog effects in one enclosure.
Each of the three effects in the Synthotron III has it’s own foot-switch allowing ease of engaging/ disengaging each section of the pedal.
The Synthotron III is true bypass so will not impact your tone when not engaged. It runs off a standard DC 9 volt pedal power supply. Inside the Synthotron it takes the 9 volts and converts to 18 volts for maximum headroom and stability.
The Synthotron III is the most unique sounding pedal I have ever created. Synthotron I and II were unique, but also quite polarising - the inherent challenges with
tracking meant that people seemed to either adore it or be utterly mystified by it. Synthotron III offers all the things people loved about it’s predecessors, but a vastly improved and expanded design.
This is the only pedal in the world that can create these sounds. There are thousands of Fuzz pedals, Chorus pedals and overdrive pedals. But only ONE Synthotron.
Each pedal will be hand signed and numbered by me, Ben Fulton.
Specs
- True Bypass
- 100% Analog
- 9 Volt DC - from any standard guitar pedal external power supply. Tip negative.
- 130mA current draw
- Dimensions: 144mm x 121mm x 56mm
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 4
Tough STINKY ball
Size: Large, Color: Red
This ball is the only one I've found that my dog can not destroy in seconds. He can chew on it for a few weeks before he works a hole in it. That's the good part. The bad side is the horrible smell! It doesn't seem to bother him, but it is horrible to my nose. It is so awful that I tried soaking it and dish soap and vinegar water overnight to see if I could make it go away. It was a little bit better but still stunk. Anybody got other suggestions on what could make the smell go away?
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Reviewed in the United States on April 12, 2026
★★★★★ 5
A good toy for chewers!!
Size: Large, Color: Blue
My dog loves this ball! The best part is that he hasn't destroyed it yet. He's a real chewer and has destroyed several toys since I got him about 6 months ago. The ball is very solid and a the squeak is not annoying. A great toy
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Reviewed in the United States on May 28, 2026
★★★★★ 5
My dog loves it, holds up well
Size: Large, Color: Blue
My German Shepherd absolutely loves this ball! He is a pretty aggressive chewer and it has held up really well, not indestructible but it lasts. We currently have three and he always has one in his mouth.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Lasted a year with a Great Dane
Size: Large, Color: Red, Size: Large, Color: Red
It lasted an entire year as my Great Dane’s favorite squeaky ball. The only reason it’s failing is because the squeaker no longer works great.
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Reviewed in the United States on May 31, 2026
★★★★★ 3
Not indestructible but pretty darn tuff for sure!
Size: Large, Color: Blue
I would have maybe given a better rating if they hadn’t lied about it being indestructible and recommended it for my dogs size range! It didn’t last the first day. However my dog may be a bit above average when it comes to his relationship with the balls! It’s an issue and he should probably be in a 12 step program of some kind. But we all have our vices right and his is balls. All of them he needs em and he never stops joining for them and the stronger they are the more he’s driven to defeat it! So now that you have full disclosure from me. The ball is still in his box and it’s still round and mostly intact and that’s after several months! The part that didn’t last the first day was the squeaker! Poor little dude! If he would have just stayed quite it. But he didn’t and Bo dog knew he was in there! And made short work of him. Other than that. The ball pretty dang tough! But it’s not indestructible is it a big deal. Well in this world of way to many choices and then having to find the few that will tell you honestly what your getting and are not over stating their product! Just to get your money. And couldn’t care less about the quality! It sucks that we have to navigate all the crap to find the few decent things available. So it most certainly does matter! And I say that for their benefit the most hopefully! Because people are craving and constantly looking for a company that just makes the effort to put out the best they can. And tell you the honest description of what they have. That stands behind their work and puts more effort into quality then they do into profit. With the faith that the quality and integrity in their company will end up bring them the profits they can be proud of and know that they earned! Honestly! Is this company one of those! I don’t know? It’s not clear and in their defense I never reported the sneaky man’s demise on day one! I expected that. But indestructible is a descriptive word that has a very specific meaning. And when it’s used in a manner that it was! Then you’ve set yourself up to fail as there are very few things that meet that description! And I know I’m picking hairs here. But it’s words that get used like that wich makes one appear to have not met the standard they wanted to! And maybe you don’t realize its impact on your overall until it’s far down the road! Can it be said better. Sure . Always room for improvement. But I would certainly remove the claim that’s just unreasonable to expect. If I wanted to use the benifit the does have to offer perhaps I would have said this ball is the closest thing to indestructible we’ve made so far. That’s statement tell me that they are not claiming it is but that it’s pretty tough! And it with out exact words tells you these guys must take honesty seriously or they wouldn’t have chosen to claim the accurate step below. And that lets me know that they hold themselves to a standard that they obviously respect their customers and they don’t take them for granted that’s integrity right there and there’s just not enough of it o. This world today! Seems to me that there are a few that are really close to it though. Maybe so close it’s worth the time to just go ahead and say it. If my gut feeling is right then it’s absolutely worth the time! Do I recommend the item absolutely it’s as tough as nails! And if you hate the squeaky part. Then don’t worry it won’t last long if your dogs like mine. Or you can take the little dude out when the dogs sleeping! And I’m going to add a star because when I look at it in the wider view I’ve been a bit harder then is justified I believe. Their. Our lives today are not as good as they once were and should be! Because of our bad habit of not holding ourselves to the standards we are capable of and rather settling for what’s out there at the time. Because of many reasons right. What’s the point. Or it’s not going to change a thing. Or that as good as it needs to be. Don’t want to seem so picky and all the justification we inject in the place of our potential. That’s had a vey negative effect across the board! And we’re losing so much more then quality dog toys as a result. When we let or standards drop due to whatever reasons as a civilization then are standards drop. And that’s all you should need to know. To understand where that leads! And we only do ourselves the disservice and loss that comes from those choices. So look around and don’t hesitate to. All out that when you see it. Just try and come from a place that’s not to tear things down but to remind them of what they are really capable of! And how much we all need to hold ourselves to the highest standard we are capable of! And stop justifying excepting less! And then we see the results from that rather than the other.
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Reviewed in the United States on August 18, 2025