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Boss TU-3 Chromatic Pedal Tuner

Chromatic Pedal Tuner

TU-3 - Top

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Product Description for the Boss TU-3 Chromatic Pedal Tuner

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. The TU-3 incorporates a convenient Note Name Indicator that can display notes of 7-string guitars and 6-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!


  • 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
  • Supplies power for up to seven BOSS compact effect pedals
Brand Boss
Weight 1.2000
Dimensions (WxHxD) 2.9 x 2.3 x 5.2

Customer Reviews

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Excellent... for a stomp box tuner
Review by Ethan

The Boss TU series seems to be the industry standard for stompbox guitar tuners. I used a TU-2 for years and had no functional problems with it. It\'s well built, responsive, legible and, needless to say, accurate. It also functions as a kill switch for changing guitars during a gig.


Don\'t bother trying to daisy chain the power supply using the output on the back of the pedal. Whatever pedal you plug into it will be very noisy. More importantly, the TU-2 degrades your tone significantly. I tried my friend\'s TU-3 and it does the same thing. It\'s shocking how much juice this thing sucks out of your signal. My Boss delay doesn\'t degrade my tone anywhere near as much as the tuner.

My recommendation is to use a clip-on tuner instead. You don\'t have to look down to see it, it\'s never on the other side of the stage, it works with an acoustic guitar, and it does not infest your signal flow. (Posted on 2/27/11)

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