Boss TU-3S Chromatic Tuner

Boss TU-3S Chromatic Tuner

Product code: bostu3s

The Boss TU-3s offers TU-3 tuning facilities in a compact unit for pedalboards where space is at a premium.


  • Boss TU-3S Chromatic Tuner

    The Boss TU-3s offers TU-3 tuning facilities in a compact unit for pedalboards where space is at a premium.

    Main 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
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    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

    Boss TU-3s 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)
    Current Draw: 35 mA (DC 9 V), 95 mA (DC 9 V, when High Brightness mode is on)
    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, OUTPUT jack, DC IN jack, DC OUT jack
    Accessories: Owner's Manual< Parallel DC code (DC Plug x2), Rubber foot
    Dimensions (W x D x H): 73 x 84 x 56 mm / 2-7/8 x 3-5/16 x 2-1/4 inches
    Weight (including battery): 220 g / 8 oz

  • This product is in stock and ready to ship

    This item is normally sent to Mainland UK addresses by DPD who generally provide a one-hour window of delivery on the morning of delivery by email or text message. If you need this item faster, please upgrade to a Before 12 service at checkout.

    Mainland UK: £3.50 within mainland UK ( Orders over £99 are delivered FREE )

    UK Non-Mainland: £ 12

    Rep. of Ireland and Mainland Europe: from £ 15 (calculated at checkout). International orders over £250 are delivered FREE.

    Order this item before 4pm and receive it on the next working day, mainland UK only*

  • Additional Information

    Specifications No
    Brand Boss
    Condition New
    Documentation No

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