With the TU-3W, BOSS brings Waza Craft mojo to the world’s leading stompbox tuner. At its core, the TU-3W provides rock-solid tuning equivalent to the industry-standard TU-3. In true Waza tradition, the pedal’s benchmark functionality is further enhanced with BOSS skill and craftsmanship. Pure, uncolored signal transfer is essential for a tuner, and the TU-3W features redesigned circuitry with selectable buffered or true-bypass operation and the most transparent audio pass-through possible. Packing high-end performance for discriminating players, the TU-3W delivers a premium pedal experience only available from BOSS.


  • The world’s leading stompbox tuner, enhanced with Waza innovation and craftsmanship
  • Superior tuning and premium signal buffer in one pedal
  • Tuning functions are identical to the industry-standard TU-3
  • Refined audio circuitry for exceptionally pure signal pass-through
  • Buffer can be turned off for true-bypass operation
  • BOSS five-year warranty


**PSA240 9v Power Adapter**

Boss TU-3W Chromatic Tuner

$279.00 Regular Price
$265.05Sale Price
  • Tuning Range: C0 (16.35 Hz)--C8 (4,186 Hz)

    Reference Pitch: A4 = 436--445 Hz (1 Hz step)

    Tuning Accuracy: +/- 1 cent


    - Chromatic
    - Chromatic flat x2
    - Guitar
    - Guitar flat x2
    - Bass
    - Bass flat x3

    Display mode

    - Cent mode
    - Stream mode

    Power Supply

    - Alkaline battery (9V, 6LR61) or Carbon-zinc battery (9V, 6F22)
    - AC adaptor (sold separately)

    Bypass: Buffered bypass or True bypass


    - Pedal switch
    - OUTPUT switch (BUF/THRU SW)
    - MODE button
    - STREAM/CENT button


    - INPUT jack
    - OUTPUT jack
    - DC IN jack
    - DC OUT jack

    Expected battery life under continuous use: 

    - Alkaline: Approx. 6 hours

    - Carbon: Approx. 0.5 hours

    (These figures will vary depending on the actual conditions of use.)


    - Owner's Manual
    - Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information")
    - Alkaline battery (9V, 6LR61)

    Options (sold separately)

    - AC adaptor: PSA series
    - Parallel DC cord: PCS-20A (DC Plug x8)

Castle Hill Store
Opening Hours

Monday to Friday: 9.30am - 6pm 

(School holidays: 5.30pm)  

Saturday: 9.30am - 4pm

Sunday: Closed

Rouse Hill Store

Opening Hours​

Monday-Friday: 9.00am - 5.30pm

Thursday: 9.00am - 9.00pm

Saturday: 9.00am - 5.00pm

Sunday: 10.00am - 5.00pm