Unit67 reviews

When you try the Unit67, please send us your feedback so we can publish it here! We are all very proud of this product and hopefully you’ll enjoy it as much as we all do!



Salzburg, Austria, guitar player from the UK with 38 years playing experience.


 “This is an honest review by a fully paying customer.  I just received my first pedal by DryBell, the Unit67 (#139) and was at first a bit sceptical with all the hype that other reviewers have claimed this pedal to be.

All I can say is that it is all true!

This pedal has that “magic sauce” and vastly improves ones guitar sound. It makes playing a lot easier and accentuates any level of player. The notes just seem to jump out of the guitar!

The Unit67 is impressively noise-free and it is quite easy to dial in which cannot be said for a lot of other pedals out there. 

I use the Unit67 as an “Always On” pedal. Just set it and forget it. I find that it does “colour” the sound but in a very positive way. When turned off, something is greatly missing. 

I used to use a Tube Screamer for tone shaping but was never quite satisfied with the amount of compression it added even with the drive on zero and the lack of volume boost.  One of the uses of the Unit67 is to use it like I would with a Tube Screamer but without the Tube Screamer negatives, a “large” mid hump and too much compression. The Unit67’s range & sustain controls are ideally voiced for this purpose and one can add and subtract as much as one wants and tailor it exactly to ones setup. 

The “feel” & “body” it creates is just remarkable and the compression is not intrusive at all. It can definitely make things “jump out in your face” if so desired with the range control. 

It retains clarity on both single coil and humbucker pickups just as well with clean, dirty & high gain tones. It never sounds mushy regardless of the setting. One can turn off the compressor or vice versa the Rangemaster/EQ if so desired but I find the pedal sounds best utilising all its functionality at the same time. 

It equally suited to all types of guitar players regardless of style. 

Sustain & feel for days….  Everyone should have one! 

The shipping, the communication (thanks Martina), the packaging and quality of the pedal are first class for such a small company located in Croatia. And the personal touch, a handwritten “thank you” note is a rarity these days.”

Rob Nicholas



Lutherville, Maryland United States

“It really is the ultimate utility pedal. I have always played way more clean tones than any overdrive and this swings me even further into the clean camp.

You can take the boominess out of a blackface, give a single coil the girth and attack of a humbucker with the eq+compression, and just overall make things better (strat bridge people pay attention). I was a little worried having all these controls would have me constantly tweaking things but it’s really not like that at all.

Also to those that might worry that the small mini pots make it hard to dial in sounds and be precise in adjustments, forget about it! The range of each eq control is wide but not so wide as to have large unusable sections at either extreme. I’m especially grateful that the high control don’t only affect the the very top range sparkle like some high controls do, it seems to actually affect guitar centric frequencies. The range control in particular is fun to crank with boost of course.

It’s a great pedal to boost overdrive/distortion pedals in a controllable way. Being able to contour the boost and add compression allows you to play to the boostee’s (yes) strengths, not just clean boost all frequencies and hope that your OD pedal can work it out. Sure you could use a TS or klone for that, but this is more versatile.”



Firsthand impressions!

Below is some firsthand feedback from our testing guys: Silvio, Miro, Borna and Tom.

They are not our customers (of course, we couldn’t have actual Unit67 customer reviews before the release of the pedal 😊), but these guys have been using this pedal in real situations on different stages and setups for some time now, so you can read and experience firsthand impressions of using the Unit67. Biased reviews? It’s up to you to decide. We just wanted to share with you the most useful feedback we’ve gathered so far from our personal experience.



Zagreb, Croatia, guitar player, photographer & videographer

So, I should probably introduce myself first. I am not a professional musician nor any kind of sound engineer. I am just a guy behind the camera in the DryBell demo videos. Sometimes a videographer, other times photographer and on some weekends I get to play the guitar with a local country band.

I was lucky enough to have known Zvonch a long time before he ventured into this pedal building science, so the whole journey was a great thing to witness.

From the first pedals he built for some friends, Wah-Wah modifications (I still have one of those Wahs in my collection) to the first serious, serial production pedals. This guy was always extra analytical and ecstatic to expand his knowledge and to find new solutions. I’ve really enjoyed being around the workshop, watching all the bits and pieces come together, just like numerous sound testing sessions with various amps and pedals, discussions and of course, barbecues.

The Unit67. This new pedal is something else.

Several years ago, when Zvonch mentioned the idea of making a pedal like this, my words were: “That might be the only pedal I’ll ever need”.
It’s not a modulation pedal like the Vibe Machine but, an “all-around sound enhancer”…for lack of a better word at this point. It’s a combination of a clean boost, compressor, EQ, rangemaster and whatnot. Another small pedal with tons of features and huge cohones!
Even Zvonch and his team couldn’t decide how to describe this pedal and somehow it became the Unit, because it is just that. The “67” I guess, represents all the timeless sounds that ring in our heads since then.

A few weeks ago, Zvonch sent me a sample pedal to try it out. I’ve tried some pre-production models and I was blown away even then. I’ve also heard enough of the pedal while filming a new demo. But, the nature of the pedal is very much in the feel of playing a guitar, it changes the playing response. So, it’s a pedal you can hear and listen to but you have to play through it!!!

In the first few days I couldn’t put down the slide. Just a basic clean sound with a slight touch of a reverb. At first, all the settings on the pedal were set at 12 o’clock (middle). I felt no need to change anything and I was impressed even with this basic setup. Later, I started playing around with the boost, and this pedal has a ton of it. There is a nice little mark around 11 o’clock that tells you where the boost is neutral, but as soon as you push it up to 12, you can hear how massive the sound gets. And you are still at half of power.. lol. My Blues Junior loves this pedal and the Telecaster really shines through this setup. If you push your tube amp with this pedal, you will get some amazing overdrive tones with the endless sustain and with a twist!!!

There is also an EQ switch on the left that engages three key frequency pots. Low and high are pretty standard, but what is this “Range” thingy on the left? Well, this pot gives you direct supply of that specific mid-frequency that cuts through any mix, gives beautiful feedback and rewards you with some of the sweetest rhythmic “chk-chk” sounds. It works amazingly. Even at low volumes you can make the guitar and amp work in such a symbiosis so the feedback is always at hand. I am pretty sure Kruno was the guy in the DryBell kitchen who was in charge of finding the right frequency, or it might even be a cluster of frequencies, not sure about that. But I know for sure that it took some serious science time for Zvonch to extract that tone and capture it in a box. Throughout the whole making procedure, there was at least 5 other guitar players who were testing this pedal. They were testing it with different amps, combinations of the pedals and in totally different styles of music.

Sustain is beautiful even when it’s fully open, and the noise is almost equal to none. I have never found a compressor pedal with such a lack of noise. What kind of a witchcraft is this??? And there’s none of that annoying gated effect!!!
At some point, I’ve had to try combining the Unit67 with some other pedals. Of course, as soon as I put it next to the OCD I immediately shifted from Ry Cooder-ish slides to Mike McCready type of ecstatic fast leads to singing & screaming long tones and then backing the volume pot down to that “Jimi – The Wind Cries Mary” kind of clean, awesome for chords and still very punchy for all those fancy small notes you play with your pinky.

The Unit67 is like a Swiss army knife. I have used some compression pedals before, some better, some worse, but most of them were just one trick pony type of pedals that still lacked something. The same thing was with the Rangemaster boosters. Unreliable, some transistors worked the best on a certain temperature, in a certain time of year and with a massive help of horoscope for that day. Over the years I have had numerous pedals and different pedalboard setups. As the time went by, I just wanted to make things more simple, less troublesome. Zvonch knows I am too lazy to carry any pedals for the small bar gigs nowadays, and often I will go without any.
But the Unit67 is really something else. It supplies you with that Rangemaster type of high-mid frequency that helps the guitar sing, even in the middle position (both pickups), endless amount of boost and compression, EQ settings that can fit to any guitar or amp you can think of, and so on. You can either use only one of those features or combine them with your unique taste and liking, but most importantly – the whole thing sounds incredibly natural. That’s why the Unit67 is the only pedal I’ve used in the last couple of gigs and it will be the base tone for any pedal combination in the future.

You don’t need any other pedals to make the Unit67 sound good or better, it is the Unit67 that makes everything else sound better. You think that sounds cheesy? Well, how cheesy does the electric guitar sounds plugged directly into a cheap PA system? We had a small gig and the rule was: no amps allowed, the neighbors complain. I had to leave the Blues Junior to sit in a car and just went with a Tele and the Unit67. It saved the day. I managed to sound not too-embarrassing.. lol.

A couple more things. As I’ve said earlier, Zvonch is one of the most patient, thorough and analytical guys I have ever met. There was a finished product ready to be launched, almost a year ago. But Zvonch decided to give it one more go. Every single person that has heard the pedal was saying: “Why? there’s no need for that, this is already far better than any pedal in those categories, why push it further, is there even any “further”?!?!“ And he did, he pushed it even further, took it all apart, rebuilt it again and upgraded wherever he could. So this pedal is already a V-2, haha.

Hats off to him and the whole crew that have been intensively working on this pedal for the last two or more years. If I wasn’t there to film some of those procedures, I wouldn’t believe the volume of work it takes to build something so small but so great as the Unit67!



Zagreb, Croatia, guitar player & luthier

I’ve known these guys, Zvonch and Kruno, for over a decade and knowing the complete background of the Vibe Machine story, I knew that their next pedal has to be a perfectly engineered and sounding device. When Zvonch told me that he’s planning to restart an old project and build a top quality booster but with the addition of compressor and EQ, I thought: “Nice, this could save me some space on pedalboard but I already have two compressors and many pedals for boosting my signal with whom I am very pleased”. However, things became very interesting when he gave me the Unit67 prototype for testing.

A completely new world opened up! I couldn’t stop playing!

The Unit67 improved every setup I could come up with. I have tried all the guitar-amp combinations that I have and in all those situations, the Unit67 gave me something extra in sound and feel. Even my 5E3 tweed Deluxe which has a killer sound without any pedal, sounds simply better with the Unit67. Best of all, you don’t need a lot of tweaking to set your desirable sound. The pedal is very simple and in just a few minutes I managed to understand what you can do with the given controls. My favorite control is RANGE which can take me in some inspiring sonic directions.

Well done DryBell!


Zagreb, Croatia, guitar player

“I have known Zvonch for quite some time and have been a (minor) part of development and testing of the Vibe Machine and now the Unit67. Knowing that, here is my take on the Unit67.
When Kruno first told me that they were working again on a new powerful boost, I was skeptical at first. Usual questions, like, does the pedal world really need another boost? I assumed that they would take it to another level, but also thought that it’s still a boost, so it was hard for me to get excited about that.

Then the story unraveled. Yes, it’s a boost, BUT it will have EQ controls, something like a Rangemaster control, and a hi-end compressor. Well, that got me interested. 🙂
In the upcoming months the guys worked really hard and occasionally, Kruno would give me some inside info on the progress.
Then one day, Kruno came with the first prototype. At least it was the first for me.
He showed me how you can use the pedal, how the boost, eq, range and comp controls work, and then I tried it. 
It was really something to remember. As I said, I was skeptical at the whole concept, and now I’ve got it!
Soon I told them that the biggest problem they would have would be to try to explain how good the pedal was to someone who had not played it yet. Taking it from my experience. I’ll get to the whole “how good it is” part soon.
A few of us got our test pedals and we were told to play with them as much as we could while trying to detect any possible errors. I didn’t detect some obvious errors like crackling on the boost potentiometer while turning it, because I thought that’s how it’s supposed to work (like some drives, fuzzes etc.). I found out later (and it made sense in the context of Zvonch’s mania to produce perfect products) that it was an actual error (something with the first pcb circuit routing) and it’s on the list of things to fix. Nice.
I have a number of pedals and following trends, I bought an used Boss ES-8 switching system. I didn’t think that there was a need for special testing of the Unit67 on a switcher, but then something squealed like dying rat and to tell you the truth, I was happy that I had finally found something (since the task was to find errors). One of the issues I’d noticed was related to the available headroom that the Boss switcher has, and obviously the very high level of signal boost that Unit67 had at that time at certain settings (guess what the settings are 🙂). There were several iterations of fixing all of those issues, and I can tell you that Zvonch did not stop and did everything necessary to get it right. When I say everything, that actually means serious redesign of some parts of the pedal, buffer etc. This seriously prolonged the release date. I don’t want to go into the details and I think it’s better to look at the whitepaper describing the development process issued by the guys.
Then, one day Zvonch and the guys said that it was finished and that the new pedal was ready for testing. Ok…I took it home, tested for those errors that I’d noticed earlier, check, check, check…everything was ok! But…and this is a big but…in general, the pedal sounded much, much better. Sound was warmer, fuller and open but with more detail, basically you can add any (good) vintage guitar/Hi-Fi adjective in here. It was a big difference. With the V-1 of the Unit67 (no, it was not released) the sound was great and you could have one guitar, nice amp and this pedal would make it considerably better sounding, but with this V-2, it’s really something else.
So, how does it sound?…really hard to describe. Take your favorite compressor, turn up the volume on your favorite boost pedal, add an EQ pedal to cut/add bass or treble and add a good variant of the Rangemaster to the mix. Now imagine there are no cables between all those pedals, no hiss, no need to power each one separately and you probably have some idea of the sound. I would sum it all up by saying that it makes all, and I mean all of the gear that I have, sound better and more interesting to play. I have a Fender Deluxe from 1965, Fender Vibro King, Vibro Champ, Bassman (1965), Cornell Romany and a Marshall Plexi 1987X. Whatever I played through with the Unit67, it took the sound that that amp had and made it better. I was skeptical (again) on how it would react in combination with the tweed amps. My Cornell is a low wattage version, but a friend has Fender Deluxe (5E3) custom shop reissue. We tried it, and again it made things better. This was interesting since usually boosters and compressor, or any pedal for that matter don’t sound good when used with already overdriven tweed amp. Usually the tweed component is all you need.
Other than the compressor that made me seriously think about selling one other standalone hi-end comp that I’ve acquired not a long time ago, there is one thing on this pedal that makes me smile -> Range control. It’s a control that gives you bite. It adds some mid and hi-frequencies that transform you into a guitar God when used with drive/distortion, and makes the clean sounds much more interesting to play. I’ve listed all the Fender amps that I have and this Range control makes them sound even better on their clean sounds.
So, to sum it all up. This is a pedal that you didn’t think you’d need, but if you have the opportunity to try it, please do. Set all the controls as you like ’em, add a compressor, eq it a bit, turn the range up and add a little boost. Play it for a minute. Now turn the pedal off and play it again. Stop your playing and then decide do you really want to continue with your life having a sound like it is with the Unit67 turned off. It’s simple as that.. 🙂 “


London, United Kingdom, guitar player

“Hi, I’m Tom. My involvement with DryBell started as an ordinary customer – I’ve always been a vibe pedal fanatic, and when I got my hands on the Vibe Machine V-1 I fell in love and wrote a rather long and passionate review. As a result of that review, DryBell approached me to ask if I’d like to get involved as a creative advisor and editor for their written content. That was 6 years ago and the rest is history! Lucky for me I am also a beta tester for their new pedals and so got my hands on one of the Unit67s before the mad rush. Tough job, but someone’s got to do it!

I’ve now done a few gigs with the Unit67 and a lot of playing at home and this is my experience so far:

COMPRESSOR: I had up until now been using a similar style compressor, but to have something that is simpler and mixed with all these other features makes it a very clever and convenient package.

On the lower input compression setting with sustain about 12 o’clock the compressor is truly sweet and velvety. I play a lot of funk and clean stuff so the compressor really helps give added sweet definition, particularly after things like Wah, although I can easily get lost (in a good way!) in the higher compression setting for a bit of chicken pickin’! but for me somewhere in between feels like home.

BOOST: The boost gives a beautiful push to your signal I tend to use it between unity gain and about 1 o’clock for a clean but big push. But the tones to be had up higher than that start to give you the grit and gain you would almost associate with an overdrive pedal. But for me less is more and I prefer a slight boost.

EQ: I have to admit that the EQ part of the pedal is probably where I spend more of my time. I’m lucky enough to have some very nice amps indeed, but this is like the icing on the cake as it gives me the ability to fine tune and finesse EQ parameters that are not necessarily totally adjustable on the amps themselves enabling me to sweeten, brighten or darken at will whilst retaining clarity and detail.

RANGE: Whilst the range feature is great at pushing mild overdrive in an amp or pedal into more heavy and aggressive melt down, it also has some less obvious hidden treasures at lower levels (for me, around 9 o’clock) it really delivering a special defined clean sound which I found very useful for spanky funk or country blues. When I’m using overdrive at low gain and then hit the Unit67, the option to turn up the range in the EQ gives the sound a real kick and bite, Hard not to! 😉

I truly found the whole pedal completely intuitive to use despite its myriad features (I was sent the Unit67 without any instructions but didn’t have any issues getting to grips with it at all). I often think of it in terms of a mastering tool and as the guys say in the manual, it really doesn’t take you very long to find great sounds to fine tune your tone. So much flexibility and adaptability in one tiny box! Now I can take the black tape of my Beta pedal and let the world see what it is!”