TU-3 Chromatic Tuner

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Item: N13-6021

Availability: In stock

TU-3 Chromatic Tuner
TU-3 Chromatic Tuner TU-3 Chromatic Tuner


The TU-3 tuner from Boss is a straight forward but feature packed chromatic tuner with multiple modes. The TU-3 features modes for bass and guitar by string number, chromatic tuning, and even support for 7 string guitars and 6 string basses as well as flat tuning. The TU-3 also supplies power for up to seven Boss pedals.


  • 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
  • BOSS five-year warranty

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  • Tuning Range: C0 (16.35Hz)–C8 (4186Hz)
  • Reference Pitch: A4=436–445 Hz (1Hz step)
  • Tuning Accuracy: ±1 cent
  • Power Supply: DC 9 V: Dry battery 6F22 (9 V) type (carbon), Dry battery 6LR61 (9 V) type (alkaline), AC Adaptor
  • Current Draw: 30 mA (DC 9 V), 85 mA (DC 9 V, when High Brightness mode is on)
  • Width: 73 mm, 2-7/8 inches
  • Depth: 129 mm, 5-1/8 inches
  • Height: 59 mm, 2-3/8 inches
  • Weight: 390 g, 0 lbs. 14 oz.

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