Boss TU-3S Chromatic Tuner Pedal

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  • Regular price $99.99
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Boss TU-3S Chromatic Tuner Pedal

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.

The industry-standard tuner in an ultra-compact size for pedalboards.


- 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
- BOSS five-year warranty


- 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)
- Current Draw
-- 35 mA (DC 9 V)
-- 95 mA (DC 9 V, when High Brightness mode is on)