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BOSS

BOSS TU-3 Compact Chromatic Tuner | Perfect for Guitar & Bass | Industry-Standard Performance | Tank-Tough BOSS Stompbox Body | 21-Segment LED Meter | Accu-Pitch Sign Function

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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Friday, Jul 24
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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 world’s 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

Description

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 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

Voltage: 9 Volts


Amperage: 85 Milliamps


Controls Type: Knob


Power Source: Corded Electric


Hardware Interface: USB


Signal Format: Analog


Style: Basic


Color: White


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


Item Weight: 390 Grams


Item Dimensions: 4 x 3 x 6 inches


Connector Type: USB


Brand Name: BOSS


UPC: 700315930183 065491929964 270050113276 761294409664 714573528174 411378170163 714573526569 600599646742 602003603693 783627010866


Global Trade Identification Number: 00700315930183, 00761294409664, 04957054409661


Item Part Number: TU-3


Manufacturer Part Number: TU-3


Item Type Name: 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


Unit Count: 1.0 Count


Warranty Description: 90 days.


Manufacturer: BOSS


Model Name: TU-3


Model Number: TU3


Best Sellers Rank: #1,254 in Musical Instruments (See Top 100 in Musical Instruments) #1 in Guitar Signal Path & Pedal Tuners


ASIN: B004D8KX7K


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 24

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

    • Strong and acurrate
Great classic pedal from Boss! Always accurate, Suitable for string instruments, great for live performances.
Reviewed in the United States on May 28, 2026 by Javier Farfán
    • Tune while remaining plugged in to the PA with no sound bleed.
Had this one for ten years before a buzz in the system. Got a new one, same great features, mainly that I can remain plugged in to the PA system and click the pedal to tune without being heard…An Essential feature for my church playing needs. And the leds are real is easy to read from the floor. It also doesn’t seem to care if other instruments are being played while tuning, only cares about my axe. Great pedal! ... show more
Reviewed in the United States on May 16, 2026 by Lancelot
    • Great tuner
I play three instruments in a Americana band. I want to cut the signal while I swap instruments and no feedback while the instruments not being used. The boss delivered, I can switch with no noise and tune on the fly. Great box!
Reviewed in the United States on April 21, 2026 by William Blackburn
    • Boss Bass Tuner. Tunes Basses.
Works at advertised, sturdy. Does the bass things with no issues.
Reviewed in the United States on March 12, 2026 by William J. Frederick
    • Best Stage Mute.
Great tuner, better stage mute. Have one on every board I use
Reviewed in the United States on May 27, 2026 by Donny
    • Try a clip on before you spend the money for this tuner.
I was pretty happy with this tuner until I saw one my son in-law was using. It was a clip on and worked better, and was cheaper than this old stand-by. He works in a music store and as such has access to several different types.
Reviewed in the United States on January 6, 2026 by Matchrocket
    • 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!
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

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