TU-3S

Chromatic Tuner

TU-3S
Where to Buy

World-Standard Performance in a Tiny Footprint

The BOSS TU-3 is the world’s go-to stompbox tuner, trusted by players everywhere for its reliable operation and bulletproof durability. Scaled down in size, the TU-3S gives you the same industry-standard performance in a tiny footprint that saves precious pedalboard space. The display and tuning functions are identical to the TU-3—the only thing eliminated is the pedal switch. Always on and ready to go, the TU-3S is perfect for use with pedal switching systems like the BOSS ES-8 and ES-5, and ideal for any setup where space is at a premium

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
AC adaptor (sold separately)
Bypass
Buffered bypass
Controls
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 (Power on indicator)
Connectors
INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
DC IN jack
DC OUT jack
Current Draw
30 mA (DC 9 V)
85 mA (DC 9 V, when High Brightness mode is on)
Accessories
Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information")
Parallel DC cord (DC Plug x2)
Rubber foot
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
84 mm
3-5/16 inches
Height
56 mm
2-1/4 inches
Weight (including battery)
220 g
8 oz
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.
Why the BOSS TU-3 is the Go-To Tuner Pedal for Touring Pros

Why the BOSS TU-3 is the Go-To Tuner Pedal for Touring Pros

The TU-3 is the tuner of choice for the world’s finest players. Discover why this legendary utility pedal remains an industry-standard tool.Read more…

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Downloads

Support

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.

Owner’s Manuals