Chromatic Tuner

Where to Buy

The New World-Standard Tuner Has Arrived

The world’s top-selling stage tuner, the BOSS TU-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 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, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function. The TU-3 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 new-standard tuner that no guitarist or bass player should be without!

Tuning Range
C0 (16.35Hz)–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), AC Adaptor (PSA series: optional)
Current Draw
30 mA (DC 9 V), 85 mA (DC 9 V, when High Brightness mode is on)
Owner’s Manual, Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”), Dry battery/9 V type (6F22)
AC adaptor: PSA series, Parallel DC cord: PCS-20A
Size and Weight
73 mm
2-7/8 inches
129 mm
5-1/8 inches
59 mm
2-3/8 inches
390 g
0 lbs. 14 oz.
In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.
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