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!

• 21-segment LED meter with brightness control
• High-Brightness mode enhances meter visibility outdoors
• Accurate to +/- one cent
• 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 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)–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)

Accessories

Owner’s Manual, Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”), Dry battery/9 V type (6F22)

Options

AC adaptor: PSA series, Parallel DC cord: PCS-20A

Size and Weight

Width

73 mm
2-7/8 inches

Depth

129 mm
5-1/8 inches

Height

59 mm
2-3/8 inches

Weight

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.