BOSS TU-3S Chromatic Tuner

BOSS TU-3S Chromatic Tuner BOSS TU-3S Chromatic Tuner BOSS TU-3S Chromatic Tuner
BOSS TU-3S Chromatic Tuner
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BOSS TU-3S Chromatic Tuner

BOSS TU-3S Chromatic 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


  • Respected TU-3 tuning performance in a more compact size
  • 21-segment LED meter with brightness control
  • High Brightness mode enhances meter visibility outdoors
  • Accu-Pitch Sign function provides visual verification when tuning is complete
  • Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses
  • Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch
  • 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
  • BOSS five-year warranty
  • Tuning Range :  C0 (16.35 Hz)--C8 (4,186 Hz)
  • Reference Pitch :  A4 = 436--445 Hz (1 Hz step)
  • Tuning Accuracy :  +/- 1 cent


  • Chromatic
  • Chromatic flat x2
  • Guitar
  • Guitar flat x2
  • Bass
  • Bass flat x3
  • Display mode :  Cent mode, Stream mode
  • Power Supply :  AC adaptor (sold separately)
  • Current Draw :  35 mA (DC 9 V) ,95 mA (DC 9 V, when High Brightness mode is on)
  • Bypass :  Buffered bypass
  • Controls :  MODE button, STREAM/CENT button
  • 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
  • Indicator : CHECK indicator (Power on indicator)


  • INPUT jack
  • OUTPUT jack
  • DC IN jack
  • DC OUT jack


  • Owner's Manual
  • Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information")
  • Parallel DC code (DC Plug x2)
  • Rubber foot
  • Options (sold separately) : AC adaptor: PSA series, Parallel DC cord: PCS-20A (DC Plug x8)
More Information
Condition New
UPC 761294508978
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