Boss TU-3 Chromatic Tuner Pedal

Product ID: 68325

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  • Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)
  • 21-segment LED meter with brightness control
  • Robust, durable chassis to withstand plenty of stomping
  • Chromatic mode which uses the LEDs to give you precise note tuning
  • High-Brightness mode enhances meter visibility outdoors
  • Accu-Pitch Sign provides visual verification when tuning is complete
  • Flat tuning is supported with Guitar Flat mode, which allows for drop-tunings up to six semitones below standard pitch
  • Free 5 year warranty when registered with BOSS


Improving on the world’s top-selling stage tuner, the Boss TU-2, the new TU-3 adds a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare, pin-point accurate tuning all housed in a tough Boss stompbox body!

Choice Tuning

The TU-3 has modes for guitarists and bass players as well as other electro-acoustic based folk instruments. A chromatic mode utilises the on-board LED's to get you 100% correct to your desired note.

A flat-tuning mode can support up to six half-steps so that tuning 7-strung guitars and 6-string basses can also be done with ease.

Rugged construction

The Boss TU-3 Tuner pedal was designed to give you reliable operation night after night so it's built to deliver that without fail. So confident are Boss, that the TU-3 also comes with a 5-year warranty!

True bypass

A tuner should always be integrated into your guitar rig but when it's not in use, you don't want any additional noise tarnishing your performance. To this effects, the Boss TU-3 Tuner Pedal supports true-bypass for no noise, clicks or pops, simply tune up and get on with the gig.

An electric or electro-acoustic player should always have a means to get solid tuning with ease and the Boss TU-3 Tuner Pedal will deliver that for many years without fail.

Manufacturer BOSS
ModelTU-3 Chromatic Tuner Pedal
Dimensions (H x W x D) 59 x 73 x 129 mm
Weight 390 g
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

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