The Gold Standard in Stage Tuning

The TU-3—the world’s best-selling stage tuner—unites trusted BOSS tuning technology with our iconic compact pedal format. Top performers everywhere rely on this robust stomp for fast and flawless tuning night after night, thanks to its high-visibility meter, simple operation, and road-tested durability. The versatile TU-3 also includes a mute function, tone-saving buffer, and power distribution capabilities, making it an essential utility tool for every player.

Features

• Sharp 21-segment LED meter with brightness control
• High Brightness mode enhances meter visibility when playing outdoors
• Accurate to +/- one cent
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic mode for tuning to any pitch
• Guitar and Bass modes for tuning by string number, with support for 7-string guitars and 5- and 6-string basses
• Flat tuning options support down tuning up to six semitones below standard pitch (Guitar mode) and three semitones below (Bass mode)
• The output automatically mutes when the tuner is engaged, allowing for silent tuning on stage
• DC output jack for distributing power to other pedals (requires optional PSA-series adaptor and PCS-20A parallel cable)
• BOSS five-year warranty