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.
| Feature | Details |
|---|---|
| Nominal Input Level | -20 dBu |
| Input Impedance | 1 M ohm |
| Nominal Output Level | -20 dBu |
| Output Impedance | 1 k ohm |
| Recommended Load Impedance | 10 k ohms or greater |
| Bypass | Buffered bypass |
| Controls | DEPTH knob RATE knob WAVE knob Pedal switch |
| Indicator | CHECK indicator (Used for indication of check battery) |
| Connectors | INPUT jack: 1/4-inch phone type OUTPUT jack: 1/4-inch phone type DC IN jack |
| Power Supply | Carbon-zinc battery (9 V, 6F22) or Alkaline battery (9 V, 6LR61) AC adaptor (PSA series: sold separately) |
| Current Draw | 25 mA |
| Expected battery life under continuous use | Carbon: Approx. 12 hours Alkaline: Approx. 28 hours * These figures will vary depending on the actual conditions of use. |
| Accessories | Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”) Carbon-zinc battery (9 V, 6F22) |
| Options (sold separately) | AC adaptor: PSA series |
