Boss TU-3S Chromatic Tuner

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

FEATURES

• Respected TU-3 tuning performance in a more compact size
• 21-segment LED meter with brightness control
• High Brightness mode enhances meter visibility outdoors
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses
• Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch
• Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable

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)