Boss TU-3S Chromatic Tuner
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Boss TU-3S Chromatic Tuner Boss TU-3S Chromatic Tuner Angle Boss TU-3S Chromatic Tuner DC IN and OUT Boss TU-3S Chromatic Tuner On Pedalboard

Boss TU-3S Chromatic Tuner Pedal

by Boss
The Boss TU-3S gives you the same fantastic performance of the full-size TU-3 stage tuner but in an even more compact unit that is extremely..

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The Boss TU-3S gives you the same fantastic performance of the full-size TU-3 stage tuner but in an even more compact unit that is extremely pedalboard friendly.

World Standard Tuner

An amazing evolution of the extremely popular Boss TU-2, the Boss TU-3 Chromatic Tuner pedal sets the world standard for stage tuners but when pedalboard real estate is a real premium, that’s when you need the Boss TU-3S.

Incorporating all the same great features as the full-size TU-3 minus the footswitch, the TU-3S provides incredible tuning accuracy and can power up to 7 Boss pedals.

Boss TU-3 Chromatic Tuner Pedal Key Features:

  • Respected TU-3 tuning performance in a more compact size
  • 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 modes, with support for 7-string guitars and 6-string basses
  • Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch
  • Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable
  • BOSS five-year warranty

Great Features

A number of great features set the Boss TU-3 apart from other stage tuners.

The 21-segment LED metre allows for precise tuning with the brightness being adjustable so you can set it to your preference, making it suitable for dimly stages while the High-Brightness mode makes it so you can see the display clearly when playing outdoors in the sun.

A special Accu-Pitch Sign function activates giving you visual verification to let you know tuning is complete.

Different Tuning Modes

Multiple tuning modes such as Chromatic and Guitar/Bass modes allow you to get the perfect tuning for your needs. You can tune by string number with support for 7-string guitars and 6-string basses.

Flat tuning is also supported with Guitar Flat mode, allowing for drop tunings up to six semitones below standard pitch.

Extremely Fast, Accurate and Well Built

Being a Boss pedal, the TU-3 Chromatic Tuner pedal is built like a tank – perfect for taking on the tour as it gives you full confidence that it can take all the rigours of the road.

Accurate to +/- one cent and with the ability to supply power for up to seven Boss compact effect pedals, the TU-3 makes sure you sound great at all times while acting as an essential utility on your pedalboard.

Buy the Boss TU-3 Chromatic Tuner pedal today and enjoy the convenience of having one of the world’s most popular stage tuners on your board.

Boss TU-3S Chromatic Tuner Pedal Specifications:

  • Tuning Range: C0 (16.35 Hz)--C8 (4,186 Hz)
  • Reference Pitch: A4 = 436--445 Hz (1 Hz step)
  • Tuning Accuracy: +/- 1 cent


  • Chromatic
  • Chromatic flat x2
  • Guitar
  • Guitar flat x2
  • Bass
  • Bass flat x3
  • Display mode: Cent mode, Stream mode
  • Power Supply: AC adaptor (sold separately)
  • Current Draw: 35 mA (DC 9 V), 95 mA (DC 9 V, when High Brightness mode is on)
  • Bypass: Buffered bypass
  • Controls: 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 (Power on indicator)
  • Connectors: INPUT jack, OUTPUT jack, DC IN jack, DC OUT jack
  • Accessories: Owner's Manual, Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information"), Parallel DC code (DC Plug x2), Rubber foot

Boss TU-3S Chromatic Tuner Pedal Size and Weight:

  • Width: 73mm, 2-7/8 Inches
  • Depth: 84mm, 3-5/16 Inches
  • Height: 56mm, 2-1/4 Inches
  • Weight (Including Battery): 220g, 8oz


Weight (kg)0.3900

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