BOSS TU-3 Chromatic Tuner
BOSS TU-3 Chromatic Tuner
BOSS TU-3 Chromatic Tuner
BOSS TU-3 Chromatic Tuner
BOSS TU-3 Chromatic Tuner
BOSS TU-3 Chromatic Tuner

BOSS TU-3 Chromatic Tuner

Industry-standard tuner pedal for stage and studio use

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  • 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

THE NEW WORLD-STANDARD TUNER HAS ARRIVED

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!

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.

"Some pedals just need to be on your board and the TU-3 has been my rock for years now."

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