Boss TU-3S Owner’s Manual

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Year 2016

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Boss TU-3S Specification

The Boss TU-3S Chromatic Tuner is a streamlined and compact version of the renowned TU-3, designed for musicians seeking reliable tuning capabilities in a pedalboard-friendly format. Retaining the essential features of its predecessor, the TU-3S does away with the footswitch but maintains the robust tuning performance and visibility that Boss tuners are known for. It offers a precision chromatic tuning range from C0 to C8 with a calibration range of 436 to 445 Hz, ensuring versatility for various instruments and tuning preferences. The high-brightness LED meter provides excellent visibility in diverse lighting conditions, featuring a 21-segment display that supports a high-contrast mode for outdoor use. The convenient Accu-Pitch Sign function visually confirms when a tuning operation is complete, enhancing accuracy and ease of use. The TU-3S supports both chromatic and Guitar/Bass modes, making it suitable for tuning 7-string guitars and 6-string basses. It also includes a flat tuning mode, allowing for up to six semitones below standard pitch. The pedal is powered via a standard 9V DC input, compatible with Boss’s PSA power adapter, and can daisy-chain to power other pedals on a pedalboard. With its durable construction and compact design, the TU-3S is ideal for musicians who require a reliable and efficient tuning solution without occupying significant pedalboard space. This tuner combines Boss's legendary durability with modern functionality, making it an indispensable tool for both stage and studio environments.

Boss TU-3S F.A.Q.

What is the recommended power supply voltage for the Boss TU-3S?

The Boss TU-3S is recommended to be powered by a 9V DC power supply. Ensure the power supply is compatible with the pedal's specifications for optimal performance.

How can I calibrate the tuning accuracy on the Boss TU-3S?

The Boss TU-3S is factory-calibrated for accurate tuning. If calibration is necessary, refer to the manual for detailed instructions or contact Boss customer support for assistance.

How do I switch between chromatic and guitar/bass modes on the Boss TU-3S?

To switch modes, press and hold the MODE button until the desired mode appears on the display. Release the button to select the mode.

What should I do if the display on my Boss TU-3S is not turning on?

Check the power supply connection and ensure it is plugged in correctly. Verify that the power supply is functioning and providing the correct voltage. If the issue persists, consult the manual or contact support.

Can the Boss TU-3S be used for alternate tunings?

Yes, the Boss TU-3S supports alternate tunings. Use the MODE button to select chromatic mode, which allows you to tune to any pitch.

How do I maintain the Boss TU-3S for prolonged use?

Keep the pedal clean and free from dust. Use a soft, dry cloth for cleaning. Ensure all connections are secure and avoid exposing the pedal to extreme temperatures or moisture.

What should I do if the tuning seems inaccurate on my Boss TU-3S?

Ensure that the pedal is properly powered and that the input/output connections are secure. Double-check the mode settings and, if necessary, refer to the manual for troubleshooting guidance.

Is it possible to bypass the Boss TU-3S?

Yes, the Boss TU-3S has a bypass feature. When not in use, the signal passes through the pedal without affecting the sound.

Can I use the Boss TU-3S with a daisy chain power supply?

Yes, the Boss TU-3S can be powered using a daisy chain power supply, as long as the total current draw of all connected pedals does not exceed the power supply's capacity.

How can I improve the visibility of the display on my Boss TU-3S during live performances?

The Boss TU-3S features a high-brightness mode for improved visibility. Press and hold the MODE button to activate this setting. Adjust stage lighting if necessary to enhance display readability.