Boss TU3 Chromatic Tuner Guitar Pedal

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The most prolific pedal tuner!
The Boss TU3 Chromatic Tuner features stomp style, 7 tuning modes & Mute/bypass – seen on more pedalboards than any other tuner, and for good reason. Solid, accurate tuning in a bomb-proof housing. Built to stand the tests of the road!

  • The New World-Standard Tuner Has Arrived

    • 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 (with optional PCS-20A Cable)
  • TU-3: Chromatic Tuner

    The New World-Standard Tuner Has Arrived


    Tuning Range
    C0 (16.35Hz)C8 (4186Hz)
    Reference Pitch
    A4=436445 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 (PSA series: optional)
    Current Draw
    30 mA (DC 9 V), 85 mA (DC 9 V, when High Brightness mode is on)
    Owners Manual, Leaflet (USING THE UNIT SAFELY, IMPORTANT NOTES, and Information), Dry battery/9 V type (6F22)
    AC adaptor: PSA series, Parallel DC cord: PCS-20A
    Size and Weight
    73 mm
    2-7/8 inches
    129 mm
    5-1/8 inches
    59 mm
    2-3/8 inches
    390 g
    0 lbs. 14 oz.
    In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.