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!
- 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
Tech Specs
-
- Type:Chromatic
- Format:Pedal
- Display Type:LED
- Reference Pitch:A4 = 436Hz-445Hz
- Tuning Range:C0-C8 (16.3-4186Hz)
- Accuracy:±1 cent
- Tuning Modes:Chromatic, Flat, Drop Tuning, Guitar, Bass
- Inputs:1 x 1/4″ (instrument)
- Outputs:1 x 1/4″ (main), 1 x 1/4″ (bypass)
- Power Supply:9V DC power supply (sold separately)
- Power Usage:30mA (standard), 85mA (High Brightness mode)
- Batteries:1 x 9V (included)
- Height:2.32″
- Depth:5.08″
- Width:2.87″
- Weight:0.86 lbs.
- Manufacturer Part Number:TU-3














![Guns N' Roses - G N' R Lies CD M [Genre] Disc is MINT, liners have the lightest wear. Go to eclsounds.com to view pics and flash sales.](https://zashabuti.com/wp-content/uploads/2025/01/7356201-037285864f7d0ab676b764f7d0ab676b9169396241164f7d0ab676bf-9-247x296.jpeg)
![Kronos Quartet - Winter Was Hard CD M 1988 [Genre] From the private collection of famed record producer Tucker Martine who’s worked with My Morning Jacket, Bill Frisell, The Decemberists, Sufjan Stevens, Modest Mouse to name a few.](https://zashabuti.com/wp-content/uploads/2025/01/460210-0647026664f7c19aa69a764f7c19aa69aa169395855464f7c19aa69ae-1-247x296.jpeg)
![Leonard Bernstein, Israel Philharmonic - The Three Symphonies - 3xLP NM or M- 1978 [Genre] PROMO - All 3 LPs are NM / Booklet and inserts are NM / Box is VG+All records are Ultrasonic Cleaned on a KLAudio machine for improved audio fidelity and sonics! Go to eclsounds.com to view pics and flash sales.](https://zashabuti.com/wp-content/uploads/2025/01/7283373-0366759664d7ac06e49cd64d7ac06e49d0169185587864d7ac06e49d5-9-247x296.jpeg)


![George Duke - The Inner Source 2xLP M 1973 [Genre] MEGA PRICE DROP! = V: 3 sides are MINT and UNTOUCHED. the other side is NM. C: Gatefold Holland Press. Matrix lines up with this listing but the MPS label is black and not red. Please inquire if you need pics. This is a legit 1973 pressing.](https://zashabuti.com/wp-content/uploads/2025/01/2107481-0314314460df43962846360df439628467162524456660df43962846e-1-247x296.jpg)
![Paul Desmond With Strings - Desmond Blue LP VG+ 1962 [Genre] V: VG+/EX sought after original Deep Groove press C: VG+/EX All records are Ultrasonic Cleaned on a KLAudio machine for improved audio fidelity and sonics! Go to eclsounds.com to view pics and flash sales.](https://zashabuti.com/wp-content/uploads/2025/01/404003-0579408764f5ffc05926864f5ffc05926a169384339264f5ffc05926e-9-247x296.jpeg)