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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: In Stock.
Fulfilled by Amazon
Arrives Nov 11 – Nov 12
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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

Item Weight: 13.8 ounces


Product Dimensions: 4 x 3 x 6 inches


Item model number: TU-3


Batteries: 1 D batteries required.


Is Discontinued By Manufacturer: No


Date First Available: January 21, 2010


Color Name: White


Hardware Interface: USB


Signal Format: Analog


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: Nov 11 – Nov 12

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

    • Good pedal
I like this pedal, makes life a lot more easier/reliable to see intonation and tuning. Thank you Boss.
Reviewed in the United States on August 1, 2025 by bm
    • 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
    • Great tuner
Accurate. What else is there to say? It's BOSS so the quality of the pedal is gonna be great. Couldn't recommend enough.
Reviewed in the United States on August 6, 2025 by Brenden
    • More than I needed
This is an awesome tuner with lots of cool additional features for all kinds of tuning capabilities. Nice bright display is easy to see and the floor pedal format is great. You can also power other pedals through this unit if you get the A/C power supply. I use mine with 9Volt and very happy with performance. I do a lot of open tunings so a must have for live performances. Very happy with purchase. ... show more
Reviewed in the United States on July 3, 2024 by J. Joyce
    • 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
    • Works great, but....
First of all, consider how you want to power it before purchasing. It comes with a 9 volt battery which they say is not for heavy duty use and therefor not made to last long. One reviewer said it eats batteries. Within 2 weeks of light usage the battery died unexpectedly when I went to use it. I considered getting replacement batteries but decided to purchase the Boss power adapter and not have to worry about the battery dying. Secondly, I was playing a gig immediately after tuning my electric bass. One of the band members told me my E string sounded out of tune. I showed him with the tuner that it showed it was in tune. At home I decided to compare the tuning using the pedal tuner with my tuning app. I discovered the tuning was the same, EXCEPT the tuning app registered my E string as a half step different than the pedal tuner. I trust the tuner app and also checked the tuning manually to confirm. A Google search found other musicians having the same issues with the pedal tuner. The solution I discovered was to do a reset of the pedal tuner which resolved the issue, but I will be checking the tuning periodically against other methods to confirm it is working properly. I played upright bass for 30 years before electronic tuning was popular. I had to tune by ear. My advice is to use the electronic tuners but also learn to listen for accuracy of pitches and trust your gut if something doesn't sound right. ... show more
Reviewed in the United States on July 4, 2024 by dtcoach
    • Solid build
Solid build. Got at a nice sale price. Expect it to last.
Reviewed in the United States on June 25, 2025 by Stan
    • Quality
Perfect tuning gear for on stage performance
Reviewed in the United States on July 13, 2025 by Don Widner

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