Boss TU-3S Chromatic Pedal Tuner

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Boss TU-3S Chromatic Pedal Tuner






The BOSS TU-3 is the world’s go-to stompbox tuner, trusted by players everywhere for its reliable operation and bulletproof durability. Scaled down in size, the TU-3S gives you the same industry-standard performance in a tiny footprint that saves  precious pedalboard space. The display and tuning functions are identical to the TU-3 — the only thing eliminated is the pedal switch. Always on and ready to go, the TU-3S is perfect for use with pedal switching systems like the BOSS ES-8 and ES-5, and ideal for any setup where space is at a premium


• 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)
• Indicator – CHECK indicator (Power on indicator)
• Connectors - INPUT jack, OUTPUT jack, DC IN jack, DC OUT jack
• Recommended Load Impedance - 10 k ohms or greater
• Options - AC adaptor: PSA series, Parallel DC cord: PCS-20A
• Width - 2-7/8 inches
• Depth - 5-1/8 inches
• Height - 2-3/8 inches
• Weight - 0 lbs. 14 oz.

Accessories - Owner’s Manual, Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”), Dry battery/9 V type (6F22)


  • Respected TU-3 tuning performance in a more compact size<br>
  • 21-segment LED meter with brightness control<br>
  • High Brightness mode enhances meter visibility outdoors<br>
  • Accu-Pitch Sign function provides visual verification when tuning is complete<br>
  • Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses<br>
  • Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch<br>
  • Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable<br>
  • BOSS five-year warranty

Additional Information

Brands Boss
Reviews & Artist Info No
Manufacturer's Suggested Retail Price $137.60
More Information No
Review No

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