BOSS TU-3W Chromatic Tuner

BOSS TU-3W Chromatic Tuner

BOSS TU-3W Chromatic Tuner

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Product Highlights

  • +/-1 Cent Tuning Accuracy
  • Signal Buffer to Decrease Tone-Sucking
  • Analog Components Used in Circuit Design
  • Waza Craft Series
  • True-Bypass Mode
  • Can Provide Power for Other Boss Pedals
  • Operates on 9V Battery
  • Optional Power Supply Available
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BOSS TU-3W overview

  • 1Description

With the TU-3W Chromatic Tuner, Boss offers a stompbox tuner from the Waza Craft series, which aims to provide high-quality tone and touch response by using analog components in the circuit design. Boss designed the tuner to deliver industry-standard tuning with +/-1 cent tuning accuracy and a transparent signal transfer.

The TU-3W features selectable buffered or true-bypass operation. The signal buffer decreases tone-sucking, essential when using long instrument cables or gargantuan pedal setups, while true-bypass mode enables your signal to pass through the pedal without an added electrical footprint.

With the TU-3W's DC output, you can daisy chain pedals for power to help minimize your rig's number of wall warts. The tuner takes up the same amount of real estate as most standard Boss pedals and runs on a 9V battery (included), or a power supply (available separately).

  • +/-1 cent tuning accuracy
  • Waza Craft series
  • Circuit design includes analog components
  • Signal buffer for maintaining tone throughout the signal chain
  • True-bypass mode for pure signal passage
  • Can provide power for other Boss pedals through DC output


UPC: 761294508961
In the Box
BOSS TU-3W Chromatic Tuner
  • 9V Alkaline Battery (6LR61)
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    BOSS TU-3W specs

    Tuning Range C0 (16.35 Hz) - C8 (4.18 kHz)
    Reference Pitch A4 = 436-445 Hz (1 Hz steps)
    Tuning Accuracy +/-1 cent
    Modes Chromatic
    Chromatic flat x 2
    Guitar flat x 2
    Bass flat x 3
    Display Mode Cent
    Bypass Buffered bypass or true bypass
    Controls Pedal switch
    Output switch (buffer/thru)
    Mode button
    Stream/cent button
    Nominal Input Level -20 dBu
    Input Impedance 1 MOhm
    Nominal Output Level -20 dBu
    Ouput Impedance 1 kOhm
    Recommended Load Impedance ≥10 kOhms
    Indicators Tuning check (serves also as battery check)
    Jacks Input
    DC in
    DC out
    Current Draw 60 mA (9 VDC)
    110 mA (9 VDC, when in High Brightness mode)
    Battery Life (approx.) Alkaline: 6 hours
    Carbon: 0.5 hours
    Power Options 1 x 9 V alkaline battery (6LR61) or 9 V carbon-zinc battery (6F22)
    AC adaptor: PSA series (sold separately)
    Parallel DC cord: PCS-20A (8 terminals) (sold separately)
    Dimensions (W x D x H) 2.9 x 5.1 x 2.4" / 73 x 129 x 59 mm
    Weight (with battery) 1 lb / 460 g
    Packaging Info
    Package Weight 1.3 lb
    Box Dimensions (LxWxH) 5.9 x 3.7 x 2.8"

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