The world’s top-selling stage tuner, the BOSS TU-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function. The TU-3 incorporates a convenient Note Name Indicator that can display notes of 7-string guitars and 6-string basses, while the Flat-Tuning mode can support up to six half-steps. It’s the new-standard tuner that no guitarist or bass player should be without!

• 21-segment LED meter with brightness control
• High-Brightness mode enhances meter visibility outdoors
• Accurate to /- one cent
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)
• Flat tuning is supported with Guitar Flat mode, which allows for “drop” tunings up to six semitones below standard pitch
• Tuner automatically mutes when the tuner is on
• Supplies power for up to seven BOSS compact effect pedals
• BOSS five-year warranty

Specifications

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.