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Boss TU12EX
Chromatic Tuner for Guitar & Bass


This successor to the legendary TU-12 provides BOSS's famous needle/LED indicators for fast, accurate tuning.
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Our Price: $99.99
List Price: $137.50
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Boss TU12EX
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This successor to the legendary TU-12 provides BOSS's famous needle/LED indicators for fast, accurate tuning. Other features include Flat Tuning of up to six half steps, ACCU-PITCH with an audible beep, a reference tone, a built-in microphone for acoustic instruments, and battery-saving Auto-Off.


  • Needle-Accurate Metering: In the tradition of itstop-selling TU-12 predecessor, the new TU-12EX offers needle-accurate meteringfor precision tuning, including high-visibility sharp and flat indicators toensure perfect tuning. Never play out of tune again!
  • Built-In Mic: The TU-12EX offers two forms of input: aline input or the built-in microphone. Plug your electric guitars and bassesinto the Line input, or simply point the built-in mic at acoustic guitars orother instruments that aren't equipped with a pickup. It's super convenient!
  • Drop-Tuning Support: For guitarists who drop-tune, theTU-12EX offers a special Flat Tuning mode, which lowers the pitch inuser-defined semitone increments. The range can be set for up to sixsemitones.


  • Tuning Range: E0 (20.6Hz) to C8 (4,186Hz)
  • Reference Pitch: A4 (438-445 Hz)
  • Tuning Accuracy: +/-1 cent
  • Power Supply: Dry battery R03 (carbon) or LR03 (alkaline); (AAA) type x 2;DC 3 V, AC adaptor DC 9V (PSA series; optional)
  • Current Draw: 12 mA
  • Expected battery life under continuous use (carbon): approx. 15hours
    *This figure will vary depending on the actual conditions of use
  • Accessories: Dry battery (R03 AAA type) x 2 (carbon), Owner's Manual, SoftCase, Leaflet ("USING THE UNIT SAFELY" and "IMPORTANT NOTES"), Information
  • Dimensions (W x D x H): 5 13/16" x 2 1/8" x 1"
  • Weight: 5 oz
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