Pre-Owned Boss TU-3 Chromatic Tuner


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Boss TU-3

BOSS TU-3 Chromatic Tuner: The New World-Standard Tuner

Introducing the next evolution in stage tuners, the BOSS TU-3 Chromatic Tuner. Building upon the success of the world's best-selling stage tuner, the TU-2, the TU-3 sets a new standard for tuning excellence. Encased in the rugged BOSS stompbox body, this tuner features a sleek 21-segment LED meter with a High-Brightness mode that ensures visibility even in the brightest outdoor conditions. Whether you're a guitarist or bassist, the TU-3 offers Chromatic and Guitar/Bass tuning modes, providing precise tuning accuracy.

Precision Tuning and Versatile Features

With the Accu-Pitch Sign function, the TU-3 delivers visual confirmation of pinpoint tuning accuracy. The Note Name Indicator conveniently displays notes for 7-string guitars and 6-string basses, making it versatile for various instruments. Additionally, the Flat-Tuning mode supports tuning down to six half-steps. The TU-3 is designed to meet the demands of professional musicians, offering unparalleled tuning accuracy and user-friendly features.


  • Tuning Range: C0 (16.35 Hz) to C8 (4,186 Hz)
  • Reference Pitch: A4 = 436 to 445 Hz (1 Hz step)
  • Tuning Accuracy: +/- 1 cent
  • Modes: Chromatic, Chromatic flat x2, Guitar, Guitar flat x2, Bass, Bass flat x3
  • Display Mode: Cent mode, Stream mode
  • Power Supply: Carbon-zinc battery (9V, 6F22) or Alkaline battery (9V, 6LR61), AC adaptor (sold separately)
  • Bypass: Buffered bypass
  • Controls: Pedal switch, MODE button, STREAM/CENT button
  • Nominal Input Level: -20 dBu
  • Input Impedance: 1 M ohm
  • Nominal Output Level: -20 dBu
  • Output Impedance: 1 k ohm
  • Recommended Load Impedance: 10 k ohms or greater
  • Indicator: CHECK indicator (Serves also as 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, when High Brightness mode is on)
  • Expected battery life under continuous use: Carbon: Approx. 5 hours, Alkaline: Approx. 21 hours *These figures will vary depending on the actual conditions of use.
  • Width: 73 mm (2-7/8 inches)
  • Depth: 129 mm (5-1/8 inches)
  • Height: 59 mm (2-3/8 inches)
  • Weight (including battery): 390 g (14 oz)

The BOSS TU-3 Chromatic Tuner is the ultimate tuning solution for any guitarist or bassist, offering unparalleled accuracy, durability, and user-friendly features. Upgrade your tuning experience and ensure your instrument is always in perfect pitch with the TU-3.

SN: ZY77111


This pedal works nicely as intended and is in very good condition, exhibiting some minor external wear as can be seen in photos.

*** This item is at Five Star Guitars on consignment. As a result, all sales are final.***