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Boss Chromatic Tuner/Power Supply

SKU: BSTU3 MFR: TU-3
$89.99
$109.99
Save: $20 (18%)
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Key Features

  • Get precise tuning every time with this durable Boss chromatic tuner pedal.
  • Quickly tune on stage or in the studio; this tuner's display is clear & bright!
  • Power your pedalboard! This tuner doubles as a reliable 9V power supply.
  • Enjoy versatile tuning options for guitar, bass, and other instruments.
  • Accurate to +/- 1 cent, achieve perfect intonation with this tuner pedal.
  • Road-ready and portable, this compact tuner is built to last for years.
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Special Order?Estimated to Ship: 08/12/2025
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Boss TU-3 Specifications

  • Tuning Range

    C0 (16.35Hz)-C8 (4186Hz)

  • Reference Pitch

    A4=436-445 Hz (1Hz step)

  • Tuning Accuracy

    +/- 1 cent

  • Power Supply

    DC 9 V: Dry battery 6F22 (9 V) type (carbon), Dry battery 6LR61 (9 V) type
    (alkaline), AC Adaptor (PSA series: optional)

  • Current Draw

    30 mA (DC 9 V), 85 mA (DC 9 V, when High Brightness mode is on)

  • Accessories

    Owner's Manual, Leaflet ("USING THE UNIT SAFELY,"IMPORTANT NOTES," and"Information"), Dry battery/9 V type (6F22)

  • Options

    AC adaptor: PSA series, Parallel DC cord: PCS-20A

  • Dimensions (W x D x H)

    73 x 129 x 59 mm (2-7/8 x 5-1/8 x 2-3/8")

  • Weight

    390 g (0.9 lbs)

  • UPC Code

    761294409664

5 Accessories for Boss Chromatic Tuner/Power Supply

  • All Accessories (5)
  • Cables & Adapters (5)
Models
BOSS Chromatic Tuner/Power Supply
$89.99

$109.99

Save:$20.00 (18%)

Special Order

Generally ships in 7-14 days, subject to availability

BOSS Tuner & Metronome

SKU: BSTU30

MFR: TU-30

$53.99

Special Order

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BOSS Clip-On Chromatic Tuner, Red

SKU: BSTU10RD

MFR: TU-10-RD

$52.99

Special Order

Generally ships in 7-14 days, subject to availability

TypeTuners & MetronomesTuners & MetronomesTuners & Metronomes

About Boss TU-3

Boss TU-3 Features

  • 21-segment LED meter with brightness control
  • High-Brightness mode enhances meter visibility outdoors
  • Accurate to +/- one cent
  • Accu-Pitch Sign function provides visual verification when tuning is complete
  • Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)
  • Flat tuning is supported with Guitar Flat mode, which allows for"drop" tunings up to six semitones below standard pitch
  • Tuner automatically mutes when the tuner is on
  • Supplies power for up to seven BOSS compact effect pedals

Warranty Information

This product has a limited warranty of 60 months.

Key Features

  • Get precise tuning every time with this durable Boss chromatic tuner pedal.
  • Quickly tune on stage or in the studio; this tuner's display is clear & bright!
  • Power your pedalboard! This tuner doubles as a reliable 9V power supply.
  • Enjoy versatile tuning options for guitar, bass, and other instruments.
  • Accurate to +/- 1 cent, achieve perfect intonation with this tuner pedal.
  • Road-ready and portable, this compact tuner is built to last for years.

What's in the box:

  • Chromatic Tuner
  • Owner's Manual
  • Leaflet
  • Dry Battery/9 V Type (6F22)
  • BOSS 5 Year Warranty