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Boss TU-3 Chromatic Tuner

Boss TU-3 Tuner

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)



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)


• Width: 73 mm, 2-7/8"

• Depth: 129 mm, 5-1/8"

• Height: 59 mm, 2-3/8"

• Weight: 390g, 14 oz.