Detail 01
±1 cent accuracy
Gives the tuner its stated precision for checking pitch.
Product detailSKU #1500000282414
BOSSTU-3 Chromatic Tuner Pedal Power Solution Bundle
1/4
Independent shopping perspective
The Korena take
BOSS’s TU-3 bundle centers on a pedal tuner with chromatic, guitar, and bass modes, plus support for 7-string guitar and 4-, 5-, and 6-string bass. Its 21-segment LED meter offers adjustable brightness and ±1-cent accuracy, with visual Accu-Pitch confirmation. Activating the tuner mutes the signal for quiet stage changes. It also provides 9V power for up to seven additional BOSS compact pedals, making it useful at the front of a compact pedalboard.
Strong match
Who this is for
- Silent tuning between songs when a muted signal path is needed onstage.
- Guitar and bass pedalboards that need tuning plus power for additional BOSS compact pedals.
- Players using 7-string guitar or 4-, 5-, or 6-string basses.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
21-segment LED meter
Shows sharp, flat, and in-tune readings with adjustable brightness.
Detail 03
2,000 mA maximum DC output
Relates to the stated ability to power up to seven additional BOSS compact pedals.
Detail 04
A4 = 436–445 Hz, in 1 Hz steps
Lets you set the reference pitch within that stated range.
Final check
Know before you order
- 01The DC output configuration is sleeve positive and tip/center negative.
- 02Power options listed are a 9V carbon or alkaline battery, or an AC adapter.
- 03The unit's stated dimensions are 2.8 x 5.12 x 2.37 inches.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does it mute the signal while tuning?
Yes. Activating the tuner automatically mutes the signal.
02Can it tune a 7-string guitar?
Yes. It supports 7-string guitars, along with 4-, 5-, and 6-string basses.
03How many BOSS compact pedals can it power?
The TU-3 is stated to power up to seven additional BOSS compact pedals.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
4 detailsConnections & power
- DC Output
- 2,000 mA maximum
- Power Supply
- DC 9V: Dry battery 6F22 (9V) type (carbon), Dry battery 6LR61 (9V) type (alkaline), AC adapter
- Input Voltage Range
- 100-240V/50-60Hz
- Output Voltage
- 9V
2 detailsSize & weight
- Weight
- 14
- Dimensions
- 2.8 inch x 5.12 inch x 2.37 inch (73 x 129 x 59)
5 detailsOther
- Configuration
- sleeve positive, tip (center) negative
- Reference Pitch
- A4=436-445Hz (1Hz step)
- Tuning Accuracy
- ±1 cent
- Tuning Range
- C0 (16.35Hz) -C8 (4186Hz)
- Current Draw
- 30 mA (DC 9V), 85mA (DC 9V, when High Brightness mode is on)
