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BOSS

BOSS TU-3 Chromatic Floor Tuner for Guitar and Bass | Industry-Standard Performance | Tank-Tough BOSS Stompbox Body | 21-Segment LED Meter | Accurate to +/- One Cent | Accu-Pitch Sign Function

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Availability: Only 2 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Feb 21
Order within 11 hours and 35 minutes
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Style: Standard


Pattern Name: Tuner


Features

  • Tune your guitar or bass on stage with the TU-3, successor of the BOSS TU-2, the worlds top-selling stage tuner
  • Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare
  • 21-segment LED meter with brightness control
  • Accurate to +/- one cent
  • Accu-Pitch Sign function provides visual verification when tuning is complete
  • Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)
  • Flat tuning is supported with Guitar Flat mode, which allows for drop tunings up to six semitones below standard pitch
  • Tuner automatically mutes when the tuner is on
  • BOSS five-year warranty

Description

The new world-standard tuner has arrived the world’s top- selling stage tuner, the BOSS T-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth segment LED meter with a high-brightness mode that cuts through the harshest outdoor glare. Choose between chromatic or guitar/bass tuning modes, and enjoy visual pinpoint tuning verification with the Ace-Pitch sign function. The TU-3 incorporates a convenient note name indicator that can display notes of string guitars and string basses, while the flat-tuning mode can support up to six half-steps. It’s the new-standard tuner that no guitarist or bass player should be without! . From the Manufacturer TU-3 Chromatic Tuner Bringing the legendary stomp pedal quality and ruggedness to the tuner world. The world’s top-selling stage tuner, the BOSS TU-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High- Brightness mode that cuts through the harshest outdoor glare. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function. • 21-segment LED meter with brightness control • High-Brightness mode enhances meter visibility outdoors • Accurate to +/- one cent • Accu-Pitch Sign function provides visual verification when tuning is complete • Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses) • Flat tuning is supported with Guitar Flat mode, which allows for “drop” tunings up to six semitones below standard pitch • Tuner automatically mutes when the tuner is on

Brand: BOSS


Style: Standard


Color: White


Product Dimensions: 3.85"L x 2.65"W x 6"H


Item Weight: 390 Grams


Item Weight: 13.8 ounces


Product Dimensions: 4 x 3 x 6 inches


Item model number: TU3


Batteries: 1 D batteries required.


Is Discontinued By Manufacturer: No


Date First Available: January 21, 2010


Body Material: Metal/Plastic


Color Name: White


Connector Type: USB


Hardware Interface: USB


Signal Format: Analog


Material Type: Metal, Plastic


Size: (TU-3)


Battery type: NiMH


Power Source: Corded Electric


Voltage: 9 Volts


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Feb 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great tuner!
I had been using a Polytune, then started having some problems with it, so I got this as a replacement and really like it better than the Polytune, mainly because it gives you a much more precise reading, even down to cents as opposed to so many tuners that will tell you the string is in tune as long as the intonation is within an acceptable range of tolerance. So if one string is a little sharp, and the next string is a little flat, you got a problem! This tuner is sort of like an analog style that really lets you know where you're at. It is very silent, no click when you hit it. However, unlike the Polytune, you just hit one string at a time, which works for me. How can you go wrong with Boss? ... show more
Reviewed in the United States on December 18, 2025 by Amazon Customer
    • Double duty pedal, tuner and a splitter
When I'm playing at home, I play with a Peavey Vypyr amp. Those amps have terrible tuners. Never seems to pick up the correct note on my guitar. This tuner is much better. Easy configuration, you can set it for guitar or chomatic or flat steps down, etc. The interface is super easy to read. I personally like the style where it looks like the LEDs are spinning right/left for sharp/flat, but they have the standard off from center tuning that most tuners use. All in all, this is a great tuner pedal, and I'm very happy with it. It does what it does very well. The thing I really like about this tuner is that there is an output and a bypass. Output gets cut when the pedal is active. If you are playing live, this is the one you will want to use. Bypass never gets cut. It's great for at home or if you are tuning somebody else to your instrument. But there's another awesome use for it; you can use it as a splitter and run your signal through 2 amps. This is fantastic for recording. Setting one amp up for the low end and another amp up for the high end and then mixing them together in the studio software makes for a very full sounding recording. If you want to run the same effects, put the tuner last, if you want to run different effects, put the tuner first. ... show more
Reviewed in the United States on June 17, 2015 by T. Hanson
    • EXCELENTE EFECTO
Excelente producto.
Reviewed in the United States on January 8, 2026 by Diego
    • Best Utilitarian Pedal!
Best utilitarian pedal ever! Everyone needs to tune, and this gets the job done efficiently and quietly! Worth it!
Reviewed in the United States on January 7, 2026 by Peter Wilson
    • Great tuner
It’s a tuner. It’s a boss. What could go wrong? This thing is great, works well, easy to use, very intuitive and easy to read. I’ve been waiting to buy a pedal tuner for some time now to replace the clip on tuners (though they still have their place) and finally decided on this especially with a recent sale. Great item, I expect it to last a long time like my other boss pedals. ... show more
Reviewed in the United States on December 3, 2024 by D Boy Flex
    • Good, but maybe NOT the #1 choice for bass guitar.
It is built like a tank, it is easy to read- BUT- it is not stable or accurate enough for bass guitar from my experience. Takes far too long to lock in on low B and E strings. In live use it’s more of a get close and hope than assurance of solid tuning of lowest notes. If I fiddle with tone knobs and pickup selection it is a tad quicker, but just not practical for bass guitar in a live setting in my opinion. ... show more
Reviewed in the United States on December 16, 2025 by joan
    • Choice of two display modes to let you know if your in tune!
Review Image by Ken K. Ken K.
Everything I read says you have to have a tuner pedal on your board. So I picked this one based on other reviews. I'm a beginner intermediate player, but I understand the value of being in tune, and the aggravation you feel when what your playing just doesnt sound right. Just plug your guitar cord into the pedal and you can get yourself tuned up to exactly where your supposed to be within a minute or two... depending on the quality of the guitar and your string tuners. I have no compalint other than my $19.00 metronome and SPARK amp have tuner capabilities included. However not quite to the exact precision of the BOSS TU-3. This also has a bright display mode which can even be seen in daylight, and modes for step up and down tuning, as well as a stop scrolling lights which stop when your string is in tune, or a green light which lets you know when your in tune. If your serious about playing guitar, and you have the extra money to set out, don't hesitate. You won't be sorry. ... show more
Reviewed in the United States on January 16, 2024 by Ken K. Ken K.
    • Trusted brand never any issues.
Bought this one as a gift. Trusted brand and no issues ever.
Reviewed in the United States on October 2, 2025 by Amazon Customer

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