Pre-Owned Boss TU-3


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Boss TU-3 Tuner


Achieve Perfect Pitch with the BOSS TU-3 Chromatic Tuner

The BOSS TU-3 Chromatic Tuner, a true game-changer, has now taken the mantle from its predecessor, the iconic BOSS TU-2, and it's here to redefine your tuning experience. Encased in the renowned BOSS stompbox body, the TU-3 boasts a cutting-edge 21-segment LED meter with a High-Brightness mode, making it visible even under the harshest outdoor lighting conditions. This tuner offers both Chromatic and Guitar/Bass tuning modes, catering to the needs of guitarists and bassists alike, ensuring your instrument is perfectly in tune for every performance.

Precision Tuning at Your Fingertips

The BOSS TU-3 tuner is incredibly accurate, providing tuning with a precision of +/- one cent. Its Accu-Pitch Sign function visually confirms when your tuning is spot on, leaving no room for guesswork. Whether you're playing a 7-string guitar or a 6-string bass, the Note Name Indicator has you covered, displaying the correct notes for your instrument. Furthermore, the Flat-Tuning mode supports tunings up to six half-steps below standard pitch, catering to various musical styles and preferences.

Versatile and Reliable Performance

One of the most convenient features of the TU-3 is its automatic muting when the tuner is activated, ensuring your tuning process is silent and seamless. Moreover, this tuner is a powerhouse, capable of supplying power to up to seven BOSS compact effect pedals, simplifying your pedalboard setup. Whether you're on stage or in the studio, the BOSS TU-3 Chromatic Tuner is the reliable companion that every guitarist and bassist should have in their arsenal.


  • Nominal Input Level: -20 dBu
  • Input Impedance: 1 M ohm
  • Output Impedance: 1 k ohm
  • Recommended Load Impedance: 10 k ohms or greater
  • Indicator: CHECK indicator (also serves as a battery check indicator)
  • Connectors: INPUT jack, OUTPUT jack, BYPASS jack, DC IN jack, DC OUT jack
  • Current Draw: 20 mA (DC 9 V), 80 mA (DC 9 V with High Brightness mode on)
  • Expected Battery Life (Continuous Use):
    • Carbon: Approx. 5 hours
    • Alkaline: Approx. 21 hours *Battery life may vary depending on usage conditions.
  • Dimensions:
    • Width: 2-7/8 inches (73 mm)
    • Depth: 5-1/8 inches (129 mm)
    • Height: 2-3/8 inches (59 mm)
  • Weight (including battery): 14 oz (390 g)

The BOSS TU-3 Chromatic Tuner is more than just a tuner; it's your ticket to pitch-perfect precision, with the convenience and reliability that BOSS pedals are known for. Whether you're rocking out on stage or fine-tuning your sound in the studio, this tuner is the ultimate tool to keep your instrument in tune and your performance flawless. Don't settle for anything less than perfect pitch – make the TU-3 your trusted tuning companion today!

This pedal works nicely as intended and is in very good condition, exhibiting only gentle external wear as can be seen in photos. Original box is included.


SN: 408971C99E0K3354