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About This Listing

Housed in a tank-tough BOSS stompbox body, this Boss TU-3 Tuner features a smooth 21-segment LED meter with a High-Brightness mode.  You can see it with ease even in the harshest outdoor glare.  It’s the new-standard tuner that no guitarist or bass player should be without!  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.


• 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
• Width - 2-7/8 inches
• Depth - 5-1/8 inches
• Height - 2-3/8 inches
• Weight - 0 lbs. 14 oz.


•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
•BOSS five-year warranty

Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more

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