The Boss TU-3 sets a new standard in tuning excellence. Featuring a rugged design, enhanced LED meter, and versatile tuning modes, it’s a must-have for every guitarist and bassist.
Tuning Range
C0 (16.35 Hz)–C8 (4,186 Hz)
Reference Pitch
A4 = 436–445 Hz (1 Hz step)
Tuning Accuracy
+/- 1 cent
Modes
Chromatic
Chromatic flat x2
Guitar
Guitar flat x2
Bass
Bass flat x3
Display mode
Cent mode
Stream mode
Power Supply
Carbon-zinc battery (9V, 6F22) or Alkaline battery (9V, 6LR61)
AC adaptor (sold separately)
Bypass
Buffered bypass
Controls
Pedal switch
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 (Serves also as battery check indicator)
Connectors
INPUT jack
OUTPUT jack
BYPASS jack
DC IN jack
DC OUT jack
Current Draw
20 mA (DC 9 V)
80 mA (DC 9 V, when High Brightness mode is on)
Expected battery life under continuous use
Carbon: Approx. 5 hours
Alkaline: Approx. 21 hours
*These figures will vary depending on the actual conditions of use.
Accessories
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTE,” and “Information”)
Carbon-zinc battery (9V, 6F22)
Options (sold separately)
AC adaptor: PSA series
Parallel DC cord: PCS-20A(DC Plug x8)
Size and Weight
Width
73 mm
2-7/8 inches
Depth
129 mm
5-1/8 inches
Height
59 mm
2-3/8 inches
Weight (including battery)
390 g
14 oz
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.