Boss TU-3 Chromatic Tuner Pedal

Boss TU-3 Chromatic Tuner Pedal

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SKU: BOSSTU3 Category:
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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 six half-steps. It’s the kind of instrument pedal tuner that no performing guitarist or bass player should be without. Boss TU-3 features a smooth 21-segment LED meter with a High- Brightness mode that cuts through the harshest outdoor glare.


Boss TU-3 21-segment LED meter with brightness control

Boss TU-3’s High-Brightness mode enhances meter visibility outdoors

Accurate to +/- one cent

Accu-Pitch Sign function of Boss TU-3 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 six semitones below standard pitch

Tuner automatically mutes when the tuner is on

Supplies power for up to seven BOSS compact effect pedals (with optional PCS-20A cable)


Tuning Range: C0 (16.35Hz) to C8 (4186Hz)
Reference Pitch: A4=436-445 Hz (1Hz step)
Tuning Accuracy: +/-1 cent
Power Supply DC 9 V:
Dry battery 6F22 (9 V) type (carbon)
Dry battery 6LR61 (9 V) type (alkaline)
Power Supply AC: Optional PSA series AC Adapter (sold separately)
Current Draw:
30 mA (DC 9 V)
85 mA (DC 9 V, when High Brightness mode is on)
Included Accessories:
Owner’s Manual
Users Leaflets
Dry battery/9 V type (6F22)
Optional Accessories:
AC adaptor: PSA series, Parallel DC cord: PCS-20A
Pedal Interconnect Cables
Width: 2-7/8 inches (73 mm)
Depth: 5-1/8 inches (129 mm)
Height: 2-3/8 inches (59 mm)
Weight: 14 oz (390g)

Weight 3 lbs