Chromatic Tuner


The TU-12 is the tuner that established BOSS quality, reliability and durability as the industry standard.

Reference Pitch
A4 = 440 to 445Hz (1Hz step)
Tuning Range
C1 (32.70 Hz) to B5 (987.77 Hz)
Tuning Accuracy
+/-1 cent
Input, Output, AC Adaptor
Power Supply
DC 9 V Dry Battery, AC Adaptor
Current Draw
20 mA (max.)
Size and Weight
145 mm
5-3/4 inches
53 mm
2-1/8 inches
35 mm
1-7/16 inches
170 g
0 lbs. 6 oz.
*The specifications are subject to change without notice.
Steve Morse

Steve MorseFrom the Dixie Dregs to Deep Purple

BOSS caught up with Steve at his home in Florida in between a trip to Spain and the start of an upcoming Deep Purple tour.Read more…

Eric Chaz

Eric ChazGuitar Repairman to the Stars

Master guitar technician Eric Chaz (short for Czechanski) runs Eric’s Guitar Shop in the San Fernando Valley region of Southern California, near the heart of the Hollywood entertainment industry.Read more…



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