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!
- Accurate to +/- one cent
- Accu-Pitch Sign function provides visual verification when tuning is complete
- Mute/Bypass select for silent tuning with a single stomp
- 21-segment LED with brightness control displays string and note names, easily visible on dark stages
- 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
- Adjustable reference pitch from 438 to 445Hz
- 8-octave tuning range—the widest in its class
| Brand | Boss |
|---|---|
| Part No. | TU-3 |
| Condition | New |
| Type | Tuner |
| Power Supply Included | No |
| Signature Model | No |




