TU-12EX

Chromatic Tuner

TU-12EX
Where to Buy

Chromatic Tuner for Guitar & Bass

This successor to the legendary TU-12 provides BOSS’ 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 its top-selling TU-12 predecessor, the new TU-12EX offers needle-accurate metering for precision tuning, including high-visibility sharp and flat indicators to ensure perfect tuning. Never play out of tune again!

Built-In Mic

The TU-12EX offers two forms of input: a line input or the built-in microphone. Plug your electric guitars and basses into the Line input, or simply point the built-in mic at acoustic guitars or other instruments that aren’t equipped with a pickup. It’s super convenient!

Drop-Tuning Support

For guitarists who drop-tune, the TU-12EX offers a special Flat Tuning mode, which lowers the pitch in user-defined semitone increments. The range can be set for up to six semitones.

Tuning Range
E0 (20.6 Hz)- C8 (4,186.0 Hz)
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)
Approximately 15 hours
*This figure will vary depending on the actual conditions of use.
Accessories
Dry battery (R03 (AAA) type) x 2 (carbon), Owner’s Manual, Soft Case, Leaflet (“USING THE UNIT SAFELY” and “IMPORTANT NOTES”), Information
Size and Weight ( including batteries )
Width
148 mm
5-13/16 inches
Depth
54 mm
2-1/8 inches
Height
24 mm
1 inches
Weight
0.1 kg
0 lbs. 5 oz.
*The specifications are subject to change without notice.

Downloads

Brochures & Catalogs

Support

If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner’s Manuals

Support Documents

  • BOSS Tuners Catalog 2009

    BOSS tuners are beloved by musicians around the world for their reliability, accuracy, and user friendliness. Since 1983, the TU-12 has been an industry standard. Today’s family of BOSS tuners melds the essence of the TU-12 with modern technology in a wide variety of models.