SKU: TU3 Categories: ,


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Boss TU-3

The world’s top-selling stage tuner, the TU-2, evolves and improves with the debut of the new Boss 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
  • BOSS five-year warranty


Type: Chromatic

Format: Pedal

Display Type: LED

Reference Pitch: A4 = 436Hz-445Hz

Tuning Range: C0-C8 (16.3-4186Hz)

Accuracy: ±1 cent

Tuning Modes: Chromatic, Flat, Drop Tuning, Guitar, Bass

Inputs: 1 x 1/4″ (instrument)

Outputs: 1 x 1/4″ (main), 1 x 1/4″ (bypass)

Power Supply: 9V DC power supply (sold separately)

Power Usage: 30mA (standard), 85mA (High Brightness mode)

Batteries: 1 x 9V (included)

Dimensions: 73 x 129 x 59 mm

Weight: 0.39 kg


For more information, please visit the manufacturer's website.