Skip to main content Skip to footer

Boss TU-3 Chromatic Pedal Tuner  

Sku #712517000000000

45 day price guarantee, 45 day return policy, 100% secure shopping


In Stock & Ready To Ship

Platinum Coverage: (What’s This?)
Add to list
See All Boss Tuners

Provides easy-to-read tuning with a display made to be visible in dark or bright conditions.

One of the world's top-selling stage tuners, the BOSS TU-2, has evolved and improved into the TU-3 pedal tuner. Housed in a tank-tough BOSS stompbox body, the TU-3 chromatic tuner 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. Accu-Pitch Sign gives you pinpoint visual verification that tuning is complete. The BOSS TU-3 tuner 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 6 half-steps. It's the kind of instrument pedal tuner that no performing guitarist or bass player should be without.

  • 21-segment LED meter with brightness control
  • High-Brightness mode enhances meter visibility outdoors
  • 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 6 semitones below standard pitch
  • Signal is automatically muted when the tuner is on
  • Supplies power for up to 7 BOSS compact effect pedals (with optional PCS-20A Cable)
  • Accessories:
  • Owner's Manual
  • Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information")
  • Dry battery/9V type (6F22)

Get in tune, quick, easy, and accurately with the BOSS pedal tuner. Order one today.


TU-3 Chromatic Pedal Tuner Specifications:

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


    by PowerReviews
    BossTU-3 Chromatic Pedal Tuner

    (based on 3 reviews)

    Ratings Distribution

    • 5 Stars



    • 4 Stars



    • 3 Stars



    • 2 Stars



    • 1 Stars



    Reviewed by 3 customers

    Displaying reviews 1-3

    Back to top

    (2 of 10 customers found this review helpful)


    Boss TU-3


    from Undisclosed

    Comments about Boss TU-3 Chromatic Pedal Tuner:

    This is great addition to any pedal board or stand alone tuner. The LED is easy to read and it can power many other 9v pedals. Boss is well known for making quality product that are very sturdy.

    (4 of 4 customers found this review helpful)


    Exellent product


    from Sharon, MA

    Comments about Boss TU-3 Chromatic Pedal Tuner:

    This does exactly as advertised. It is a bit faster than its predecessor. I would recommend without pause.

    (5 of 6 customers found this review helpful)


    Great Tuner


    from Florida

    Comments about Boss TU-3 Chromatic Pedal Tuner:

    Easy to use; I like that I don't have to use my "clip On Tuner" and risk marring the headstock on my expensive Gibson guitars. It also makes changing guitars during a gig set easier by cutting off the feed, eliminating the loud "click" or walking over to the amp to put it on "standby" while I change guitars. Well worth the price. Get one!

    Displaying reviews 1-3

    Back to top