Chromatic Tuner


The BOSS TU-2 Chromatic Tuner incorporates BOSS' world renowned TU-Series tuner technology into an ultra-convenient stompbox design. For the first time ever, guitarists and bassists can now tune their instruments with unrivaled accuracy and an unmatched tuning range--with just a single stomp.

Reference Pitch
A4 = 438 to 445Hz (1Hz step)
Tuning Range
C0 (16.35 Hz) to C8 (4186.00 Hz)
Tuning Accuracy
+/-3 cent
Input Impedance
1 M ohms
Input, Output, Bypass, DC In
Power Supply
DC 9 V Dry Battery, AC Adaptor (PSA-Series: Optional)
Current Draw
55 mA (Max.)
Dry battery
AC Adaptor (PSA-Series)
Size and Weight ( incl. battery )
73 mm
2-7/8 inches
129 mm
5-1/8 inches
59 mm
2-3/8 inches
420 g
0 lbs. 15 oz.
*The specifications are subject to change without notice.



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.

Support Documents

  • TU-2 Q&A

    A collection of popular articles from the TU-2 knowledge base.

  • 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.

  • BOSS Product Catalog 2008

    Forging the Future - Innovation for Creative Inspiration
    BOSS forges into 2008 with an awe-inspiring lineup of effects, digital studios, and accessories.

  • Guitar Effects Guidebook Vol. 20