Boss TU-3 Guitar Tuner – Review

Boss TU-3 Review

With the introduction of the new TU-3, the BOSS TU-2, the world’s top-selling stage tuner, continues to evolve and improve. The TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare and is housed in a tank-tough BOSS stompbox body. With the Accu-Pitch Sign function, you may select between Chromatic and Guitar/Bass tuning modes for visual pinpoint tuning verification. When Flat-Tuning mode supports up to six half-steps, the TU-3 features a handy Note Name Indicator that may show notes for 7-string guitars and 6-string basses. No guitarist or bass player should be without this new-standard tuner!

In this our new publication will discuss unobvious and major features and options of Boss TU-3 guitar tuner. Later we will talk about problems with Boss TU 3 and technical characteristics. But if you are looking for which guitar tuner worth buying, then you can safely pick this one. In a nutshell, this is the world’s best-selling electric guitar floor tuner, reliable and simple that will last a long time. If this is not enough, then let’s look at the details.

The TU-3 is, as the name suggests, the third version (and the last one at the moment) of Boss’s most popular floor tuner. Reliability in everything is, first of all, reliability in transportation. Despite its small size, the Boss TU-3’s case is made of durable metal and can withstand strong kicks. The unique features of Boss TU-3 guitar tuner include the multi-colored LCD, which was never seen before on the traditional clip-on guitar tuners.

It has various selectable tuning possibilities for bass/guitar and popular chromatic modes (in contrast to non-chromatic tuners, allow you to determine the semitones). They are more perfect and are needed for fine tuning musical instruments. Thus, selecting the “Chromatic” option, the tuner displays the nearest note. Using “Guitar / Bass” selection, Boss TU-3 indicates the number of the currently tuned string. Also, tuner equipped with two indication modes. The “Cent” mode display the pitch of played at the moment the note. “Stream” mode shows whether you are above or below the desired note. By using guitar flat mode, you will be able to tune qualitatively as many as six semitones even below standard pitch. Verification signal in visual form appears after tuning will be done. Boss TU-3 guitar tuner helps you tune by offering support for 6 string bass and 7 string guitar.

The Boss TU-3 is one of the most popular guitar tuners on the market, and for good reason. It’s simple to use, accurate, and can be used in a variety of situations. In this video, we’re going to show you how to use the Boss TU-3 in order to tune your guitar accurately and quickly.

The tuner is equipped with one input and two outputs: “Output” and “Bypass”. This is another feature of the Boss TU-3, because 2 outputs will allow you to use it as a “Split Box”. What is the difference between the outputs? “Output” allows for silent tuning. “Bypass” simply passes the signal. A very handy option for live concerts. As for power supply, like most Boss guitar pedals, the TU-3 runs on a 9-volt battery or power adaptor. Neither one nor the other is included in the kit, so you have to buy them separately. Also you can supply power to other pedals (up to 7).

This product has more than 1200 verified reviews from customers on Amazon, and 92% of them are 5 stars.

Affordability and cost-effectiveness

When you are looking for a new guitar tuner, you are not willing to break the bank or create a hole in your wallet. The biggest plus point of selecting Boss TU-3 guitar tuner for your studio is that its cost is pocket-friendly. By investing only a handful of bucks into this product, you will bring a lot of value to your performances.

You pay a few extra bucks, and after a couple of clicks, the product is shipped safe and fast to your doorstep without you making any extra efforts and investing any additional time which is needed in visiting the stores physically. You will be pleased with every single dollar you invest in Boss TU-3 guitar tuner, making it one of the most valuable products you have ever purchased online.

Attractive looks

Boss TU-3 Guitar tuner offers a stylish design by imitating the traditional looks of a clip-on guitar tuner. It weighs just over a single pound, making it travel-friendly, so anyone can carry it easily in the pocket while performing outdoors. The visibility level of its screen is extremely clear as it features the reflection display mechanism.

Boss TU-3 Guitar Tuner - Review

This tiny portable machine does not rely on an electrical outlet. The battery that is included makes it a roadworthy gadget. So don’t worry if your live performance is situated outdoors, miles away from an electric grid.

Boss TU-3 Guitar tuner is housed in a strong, reliable, and robust stompbox body. You have the option to request customer service to provide you with the manufacturer’s warranty. This will put a lot more confidence in your purchase and make you free of any doubt.


Boss TU-3 Guitar tuner comes with a free-of-cost user’s manual with detailed instructions on how to use it, maintain, repair, or troubleshoot any problems in various languages. To help you easily cut through the unbearable outdoor glare, Boss TU-3 guitar tuner is equipped with a 21 segment LED meter which gives the most reliable and accurate readings. This tiny gadget has the capability to provide power for up to 7 effect paddles by Boss.

In conclusion, the basic features of the Boss TU-3 guitar tuner are derived from Boss Ace-pitch, which includes stream mode and flat tuning up to 5 semitones. The display is equipped with 21 segments and a high contrast mode, which will allow you to work with the tuner even in complete darkness. It all looks a lot like the perfect guitar tuner. At the very least, the Boss TU-3 is worth trying.

Benefits Boss TU-3 Guitar Tuner

  • This product works perfectly in standard or flat tuning.
  • Spot on accuracy, tones of simple tuning options, bright display, active bypass and trademark Boss durability.
  • I appreciate how it has a buffer built-in so I don’t need an another one that takes up space and power.
  • Reads so much more clear than the clip-on I was using.
  • Very visible in all lighting conditions.
  • The available modes are all super handy.
  • Love the mute feature to spare the crowd from turning up.
  • The bypass feature is incredibly useful as well.
  • It’s a tuner that will tell you what note you’re playing, and you can throw it down the stairs without it breaking.


Pretty simple review. It works exactly as you’d expect, it shows your tuning, there are a few options the manual can explain. It’s bright and easily visible in any lighting situation. There is no delay between foot taps tune in immediately, then sound back immediately. My only drawback with this pedal is that it is a Boss pedal, meaning it’s not small, a smaller pedal wouldn’t give up so much precious pedalboard space.

I have tried Vox Amp Tuners, the mobile clip on Tuners, and by far this Boss TU-3 works so much better, and you can hear the difference. I own an Epiphone SG, and it can be a challenge to tune, but this Tuner makes quick work of it every time!

Boss TU-3 Guitar Tuner works great for me. A true bypass, no noise, and easy to see on the pedal board. I really like the option to tune down when needed and it is a good size for reading. Highly recommend.

Boss TU-3 Guitar Tuner - Review

Accurate tuning. Many modes let you tune by note or string number for guitar or bass. The output and bypass options are nice depending on whether you want to use it as a kill switch. Also like that it has it’s own 9v out, so you can chain it to another low-gain pedal.

If you are a musician, you know what this does…and you know you can’t do your job without it. Boss undoubtedly makes the most accurate and reliable tuner on the market for the working musician. Brighter LEDs on the TU-3 is the only reason my very road worn TU-2s have all gotten a well deserved retirement.

If you don’t have a tuner for live music, get one! Im tired of people thinking they can wing it these days with a bunch of boutique pedals but have no room for tuners on boards. Get a tuner. Get this tuner. And use it! One of the best tuners on the market.


What is the difference between the BOSS TU-2 and the TU-3?

TU-3 comes as a refresh to the TU-2, so the new model is now overhauled but improved in several aspects. For example, the new model has 21 LED indicators on the display, which is an upgrade from the TU-2’s 11. The new offering is also more accurate, registering the notes within +/-1 cent.

What kind of batteries does BOSS TU-3 take?

The device requires a 9V battery to work. On top of that, it comes included with a GP 1604G 9V 300mAh battery already installed.

How to install a 9v battery in a BOSS TU-3 chromatic tuner?

To open the battery cavity you need to push the pedal down and then screw the knob on the bottom portion of it. Replace the battery, then push the casing down again and screw the knob back in.

BOSS TU-3 what is a check light?

Check light is there to signal the working state of the device. If the pedal is on, the light is also on.

How to reset BOSS TU-3?

While holding down the “MODE” button, turn on the power. When the green light at the center is on, press the “MODE” button once again. Wait for the green light to flash three times, and the pedal will be reset to the factory settings.

How to tune a half step down with BOSS TU-3?

Turn on the pedal, then press the “MODE” button until the LED indicator is on the ♭ symbol. On factory settings, that is two button presses from the guitar setting.

Does BOSS TU-3 make noise when muted?

The tuner isn’t supposed to interfere with the signal or make any noise when it is not engaged. If you are experiencing that, make sure that the device is plugged in correctly and that the power supply works properly. If the issue persists, contact customer support.

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