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Boss TU-3 Chromatic Tuner Pedal with Bypass

4.6 out of 5 stars 2,151 ratings
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Purchase options and add-ons

Brand BOSS
Style Standard
Colour White
Product Dimensions 9.8L x 6.7W x 15.2H Centimetres
Item weight 390 Grams
Voltage 9 Volts
Amperage 85 Milliamps
Controls type Knob
Power source Corded Electric
Hardware interface USB

About this item

  • Tune your guitar or bass on stage with the TU-3, successor of the BOSS TU-2, the worlds top-selling stage tuner
  • Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare
  • 21-segment LED meter with brightness control
  • Accurate to +/- one cent
  • Accu-Pitch Sign function provides visual verification when tuning is complete
› See more product details

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Product information

Technical Details

Product Dimensions ‎10.16 x 7.62 x 15.24 cm; 390 g
Batteries ‎1 D batteries required.
Item model number ‎TU3
Body Material ‎Metal
Colour Name ‎White
Hardware interface ‎USB
Signal format ‎Analog
Material Type ‎Metal
Region of Origin ‎Asia
Country produced in ‎Taiwan
Size ‎(TU-3)
Battery type ‎NiMH
Power Source ‎Corded Electric
Voltage ‎9 Volts
Item Weight ‎390 g

Additional Information

ASIN B004D8KX7K
Customer Reviews
4.6 out of 5 stars 2,151 ratings

4.6 out of 5 stars
鶹 Rank
Date First Available Feb. 8 2012
Manufacturer BOSS
Place of Business Denver, CO 80239,US

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Boss TU-3 Chromatic Tuner Pedal with Bypass

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Product description

The new world-standard tuner has arrived the worlds top-selling stage tuner, the BOSS T-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth segment LED meter with a high-brightness mode that cuts through the harshest outdoor glare. Choose between chromatic or guitar/bass tuning modes, and enjoy visual pinpoint tuning verification with the Ace-Pitch sign function. The TU-3 incorporates a convenient note name indicator that can display notes of string guitars and string basses, while the flat-tuning mode can support up to six half-steps. Its the new-standard tuner that no guitarist or bass player should be without! .

Top Brand: BOSS

Highly Rated
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From the manufacturer

Chromatic; Tuner; Guitar; Bass; LED; Brightness; Flat; Drop; Mode; Pitch; TU-2; Roland; Bypass
Chromatic; Tuner; Guitar; Bass; LED; Brightness; Flat; Drop; Mode; Pitch; TU-2; Roland; Bypass

FS-5U, FS-5L, Unlatch, Latch, Pedal, Effects, FX, Foot, Switch, Roland, Guitar, Keyboard
About BOSS

BOSS, a division of Roland Corporation, has achieved legendary status among guitarists, bassists, and vocalists with a diverse, class-leading product line-up of creative tools with exceptional sound, intuitive control, and rugged durability. Since 1977, BOSS has lead the way with innovative effects pedals, amplifiers, multi-effects processors, and loopers to wireless systems, vocal effects, tuners, metronomes, rhythm machines, recorders, and more.

Additional Features

  • Supplies power for up to seven BOSS compact effect pedals
  • Tuner automatically mutes when the tuner is on
  • Accurate to +/- one Cent

TU-3 Chromatic Tuner

Bringing the legendary stomp pedal quality and ruggedness to the tuner world.

The worlds top-selling stage tuner, the BOSS TU-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function.

  • 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 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
Chromatic; Tuner; Guitar; Bass; LED; Brightness; Flat; Drop; Mode; Pitch; TU-2; Roland; Bypass
TU-3
TU-3W
TU-3S
Customer Reviews
4.6 out of 5 stars 2,151
4.6 out of 5 stars 427
4.6 out of 5 stars 427
Functionality Evolved from the worlds top-selling stage tuner, ideal for use on stage TU-3 enhanced with BOSS craftsmanship and limited edition features Compact version of the TU-3, designed to save space on your pedalboard
Bypass Buffered bypass Buffered bypass or True bypass Buffered bypass
Controls Pedal switch MODE button STREAM/CENT button Pedal switch OUTPUT switch (BUF/THRU SW) MODE button STREAM/CENT button MODE button STREAM/CENT button
Width 73 mm 2-7/8 inches 73 mm 2-7/8 inches 73 mm 2-7/8 inches
Depth 129 mm 5-1/8 inches 129 mm 5-1/8 inches 84 mm 3-5/16 inches
Height 59 mm 2-3/8 inches 59 mm 2-3/8 inches 56 mm 2-1/4 inches
Weight (including battery) 390 g 14 oz 460 g 1 lb 1 oz 220 g 8 oz
Chromatic; Tuner; Guitar; Bass; LED; Brightness; Flat; Drop; Mode; Pitch; TU-2; Roland; Bypass

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Price$139.99$85.99$105.99$134.99$646.43-10%?$35.99
Was:?$39.99
Delivery
Get it by Friday, Jun 20
Get it by Friday, Jun 20
Get it by Friday, Jun 20
Get it by Friday, Jun 20
Get it Jun 23 - 27
Get it by Friday, Jun 20
Customer ratings
4.64.6 out of 5 stars2,151
4.54.5 out of 5 stars46
4.54.5 out of 5 stars160
4.64.6 out of 5 stars427
4.54.5 out of 5 stars1,666
4.14.1 out of 5 stars5,678
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Customer reviews

4.6 out of 5 stars
2,151 global ratings

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Customers say

Customers like the quality, functionality, and tuning options of the guitar effect device. They mention it's well-built, works well for acoustic and electric guitars, and enhances the music they play. Customers also appreciate the value for money, auto-mute, and compatibility.

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QualityFunctionalityTuning optionsAccuracyEase of useValue for moneyAuto-muteCompatibility
26 customers mention "Quality"26 positive0 negative

Customers are satisfied with the quality of the guitar effect device. They mention it's well-built, dependable, and accurate. Some say it meets all expectations and is a wonderful part of their gear.

"Exactly the quality one would expect from a boss pedal, works great and is built like a brick." Read more

"Its a boss so you know its quality" Read more

"...Boss makes quality durable products. So overall, a great buy!" Read more

"...The pedal is very solid and feels durable, it its not a cheap flimsy thing. I replaced my Polytune 2 with this and never looking back. Way better." Read more

20 customers mention "Functionality"18 positive2 negative

Customers like the functionality of the guitar effect device. They mention it works well to enhance the music they play. Some say it's a game-changer for their music experience.

"...It's truly a game changer for my music experience!" Read more

"Exactly the quality one would expect from a boss pedal, works great and is built like a brick." Read more

"Did as needed. Very good for tuning." Read more

"Works much better for acoustic and electric. A bit finicky on the E string on my bass... but in general accurate." Read more

17 customers mention "Tuning options"17 positive0 negative

Customers like the tuning options of the guitar effect device. They mention it's amazing, very good for tuning, and has a lot of tuning options, including chromatic and good for bass.

"I just got my hands on this amazing tuner, and I couldn't be more thrilled! It's truly a game changer for my music experience!" Read more

"Did as needed. Very good for tuning." Read more

"Essential for your pedal board if you're a guitarist. Has a lot of tuning options, including chromatic and good for bass also...." Read more

"This is the pedal tuner to beat, hands down...." Read more

9 customers mention "Accuracy"9 positive0 negative

Customers are satisfied with the accuracy of the guitar effect device. They mention it's very precise for a stage alignment.

"...A bit finicky on the E string on my bass... but in general accurate." Read more

"This pedal is built tough and very accurate. I recommend this pedal." Read more

"...Very accurate and easy to use." Read more

"Good Boss product quality ... accurate and works well ... I can recommend this product" Read more

7 customers mention "Ease of use"7 positive0 negative

Customers find the product easy to use and accurate. They mention it's easy to daisy chain.

"...the polytune from TC electronic a little easier on the eyes and a lot easier to use, but you can't go wrong with either of them...." Read more

"...Very accurate and easy to use." Read more

"...The in/out feature for a/c power makes it easy to daisy chain." Read more

"Easy to use..." Read more

4 customers mention "Value for money"4 positive0 negative

Customers are satisfied with the value for money of the guitar effect device.

"...For those tunings you can just use the chromatic mode. Over all worth the money. I would strongly recommend." Read more

"...It's also the best tuner I ever owned. For what is does, it's priced rather low in my opinion...." Read more

"Good value for money...." Read more

3 customers mention "Auto-mute"3 positive0 negative

Customers like the auto-mute feature of the guitar effect device. They mention it functions as a mute when it's in the tune mode and can be used to mute your signal and power other pedals.

"...Can be used to mute your signal too and power other pedals...." Read more

"...It also functions as a mute when it is in the tune mode." Read more

"...responsive, auto mute, pass through, chromatic. all the things you need. this unit is a BOSS" Read more

3 customers mention "Compatibility"3 positive0 negative

Customers like the compatibility of the product. They mention it's a must-have for every pedalboard and essential for guitarists.

"Essential for your pedal board if you're a guitarist. Has a lot of tuning options, including chromatic and good for bass also...." Read more

"A must have for every pedalboard!..." Read more

"Great for pedalboard..." Read more

my fav tuner ever
5 out of 5 stars
my fav tuner ever
so much better than those crappy clip on tuners !!!
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Top reviews from Canada

  • Akin
    5.0 out of 5 stars Good value for money.
    Reviewed in Canada on November 15, 2024
    Verified Purchase
    I just got my hands on this amazing tuner, and I couldn't be more thrilled! It's truly a game changer for my music experience!
    Helpful
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  • Ben M.
    5.0 out of 5 stars A must have for every pedalboard!
    Reviewed in Canada on March 25, 2025
    Verified Purchase
    Exactly the quality one would expect from a boss pedal, works great and is built like a brick.
    Helpful
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  • Doug burden
    5.0 out of 5 stars Great tuner
    Reviewed in Canada on November 27, 2024
    Verified Purchase
    Its a boss so you know its quality
    Helpful
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  • Samantha hussey
    5.0 out of 5 stars Perfect
    Reviewed in Canada on November 19, 2024
    Verified Purchase
    Did as needed. Very good for tuning.
    Helpful
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  • Bradley Thachuk
    4.0 out of 5 stars Better for acoustic and electric rather than bass... but gets the job done all around
    Reviewed in Canada on July 21, 2020
    Verified Purchase
    Works much better for acoustic and electric. A bit finicky on the E string on my bass... but in general accurate.
    2 people found this helpful
    Helpful
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  • Joe Y.
    5.0 out of 5 stars Excellent tuner, built like a tank, lots of functions!
    Reviewed in Canada on November 20, 2019
    Verified Purchase
    Essential for your pedal board if you're a guitarist. Has a lot of tuning options, including chromatic and good for bass also. Can be used to mute your signal too and power other pedals. I find that the polytune from TC electronic a little easier on the eyes and a lot easier to use, but you can't go wrong with either of them. Boss makes quality durable products. So overall, a great buy!
    2 people found this helpful
    Helpful
     Report
  • Justin
    5.0 out of 5 stars Best tuner - Better than all the rest
    Reviewed in Canada on June 20, 2019
    Verified Purchase
    You wouldn't think a tuner would be such an important pedal but the TU-3 is amazing. The buffer is very useful for keeping the signal loss at a minimum when placed in the chain. I love this pedal because the dials are easy to see and read and you can see it in the dark or out in bright daylight. The pedal is very solid and feels durable, it its not a cheap flimsy thing. I replaced my Polytune 2 with this and never looking back. Way better.
    3 people found this helpful
    Helpful
     Report
  • Mister Mr.
    5.0 out of 5 stars classic tuner!
    Reviewed in Canada on July 14, 2024
    Verified Purchase
    I bought this for my teenage step-son. I still have the TU-2 Version that I bought about 25 years ago....and it still works. You can't beat it.
    One person found this helpful
    Helpful
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Top reviews from other countries

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  • Sergio Alonso
    5.0 out of 5 stars Maravilloso
    Reviewed in Mexico on May 28, 2025
    Verified Purchase
    Excelente
    Report
  • Richard
    5.0 out of 5 stars Loads of tuning modes, can be used to route audio, and can power other pedals! :)
    Reviewed in the United Kingdom on April 21, 2018
    Verified Purchase
    I see what all the fuss is about the TU-3 tuner pedal. I've held off buying one for ages and finally decided I needed to finish my pedal board with one.

    It has multiple tuning modes and display options, will easily deal with 7-string guitars and 5-string basses, and will allow drop tunings directly from the front panel using the mode control.

    One creative use I intend to put it to is to act as a signal splitter for effects pedals since there are two outputs, "output" and "bypass". This means I can have two FX chains behind it, in my case one vintage and one modern.

    It runs from standard 9v PP3 batteries or from a wall-wart power supply that is *not* provided. Fortunately for me, I always intended to power it from a power brick (in my case a TrueTone 1Spot) using the adapter cable that TrueTone provides, attached to an outlet that can provide 12v. The fact that it can pass along power to other Boss pedals is a major plus, and it will even feel older Boss pedals because I believe it steps down the power to conform to older pedals. It certainly powers my old compressor/sustainer pedal also made by Boss, using a simple daisychain cable.

    The display can be switched to a higher brightness so that it's visible in sunlight, but the power draw of the pedal really leaps up if you do, from 30 milliamps to 85 milliamps. If you're daisychaining other Boss pedals using the TU-3's pass-thru power you'll need to bear in mind that there will be less power available for those pedals in the daisychain. Similarly you will need to allow for this if you're using a power brick PSU and switch to high brightness now and then.

    The enclosure is like all Boss compact pedals - tougher than boots and with everything, especially the battery compartment, easy as anything to access. It comes with a battery installed that has been used for testing. You're recommended to keep a battery in there (it isn't being used if there's no instrument cable in the input) but since I don't play live I just removed it.

    How does it lock on to the notes? Phenomenally well, quick even on the low B on both 7-string guitar and 5-string bass. I have a Korg Pitchblack rack tuner that I've long considered to be the canines cojones, and this definitely is the equal of that unit, and takes the capabilities a bit further with features like the various flatting options.

    It's used all the time, and the option to use it on two signal paths makes some rudimentary pedal routing hacks available.
    Report
  • kunal roy
    5.0 out of 5 stars The only tuner pedal you need + it will last a lifetime!!
    Reviewed in India on September 11, 2015
    Verified Purchase
    The only tuner pedal you need + it will last a lifetime!!
    Report
  • Rock Guy
    5.0 out of 5 stars Great tuner
    Reviewed in Australia on May 31, 2024
    Verified Purchase
    Works great and never fails to read the string tones while tuning.
    Report
  • 䥸
    5.0 out of 5 stars ĿϤޤޤǤ
    Reviewed in Japan on July 10, 2023
    Verified Purchase
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    䥸
    5.0 out of 5 stars
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    Reviewed in Japan on July 10, 2023
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