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Boss TU-3 Chromatic Tuner

Item ID: TU3



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The new world-standard tuner has arrived


Boss TU-3 Chromatic 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!



Boss TU-3 Chromatic Tuner Features at a Glance:

  • 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

Product Specifications:


Pedal Type: Chromatic Tuner
Display Type: LED
Reference Pitch:
A4 = 436-445Hz
Tuning Range:
C0-C8 (16.3-4186Hz)
Accuracy: ±1 cent
Tuning Modes: Chromatic, Flat, Drop Tuning, Guitar, Bass
Inputs: 1 x 1/4"
Outputs: 1 x 1/4" (main), 1 x 1/4" (bypass)
Input Impedance: 1 M ohn
Output Impedance: 1 k ohm
Power Supply: 9V DC power supply (sold separately)
Min Current Required: 30 mA (standard), 85 mA (High Brightness mode)
Batteries: 1 x 9V (included)
Height: 2.32"
Width: 2.87"
Depth: 5.08"
Weight: 0.86 lbs
Manufacturers Part Number: TU-3