# BOSS TU-3 Compact Chromatic Tuner Pedal

Pedal: The BOSS TU-3 is a compact chromatic floor tuner for guitar and bass, with a 21-segment LED meter and automatic signal muting while the tuner is on. Its listed tuning modes also support extended-range instruments and flat tuning, while brightness adjustment helps adapt the display to different stages.

- [Original product page](https://best-deals.pro/product/boss-tu-3-chromatic-tuner-pedal)
- [View offer](https://best-deals.pro/visit/boss-tu-3-chromatic-tuner-pedal)
- Market: US
- Language: en-US
- Currency: USD
- Brand: BOSS
- Model: TU-3
- Category: Books, Music & Hobbies > Musical Instruments
- Price: 89.96 USD
- Previous price: 109.99 USD
- Discount: 18%
- Price checked: 2026-11-12T11:23:30.072Z
- Rating: 4.8 / 5
- Reviews: 2566

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Adjustable 21-segment LED meter includes a High-Brightness mode for outdoor visibility.
- Accu-Pitch Sign provides visual confirmation when tuning is complete.
- Chromatic and Guitar/Bass modes support tuning by string number, including 7-string guitars and 6-string basses.
- Guitar Flat mode supports drop tunings up to six semitones below standard pitch.
- The tuner automatically mutes the signal while it is on.
- Can supply power to up to seven BOSS compact effect pedals through a daisy-chain connection.

## Pros

- Automatic muting allows silent tuning during performances.
- Meter brightness adjustment and a High-Brightness mode are useful for changing lighting conditions.
- Multiple tuning modes cover chromatic tuning, string-number tuning and flat tuning.
- The listing claims tuning accuracy of +/- one cent.

## Specifications

### Identity
- Brand: BOSS
- Model: TU-3
### Power and battery
- Power configuration: Corded Electric
### Dimensions and installation
- Dimensions listed: 4 x 3 x 6 inches
- Weight listed: 390 g
### Tuning and operation
- Tuning accuracy: +/- one cent
- Display: 21-segment LED meter
- Supported modes: Chromatic and Guitar/Bass mode
- Extended-range support: 7-string guitars and 6-string basses
- Flat tuning range: up to six semitones below standard pitch

## A good fit for

- Guitarists and bassists who want a floor tuner with automatic muting for stage use.
- Players who need chromatic tuning, string-number modes or support for flat tunings.
- Musicians who value a large visual meter with adjustable brightness.

## Customer feedback

Customer feedback describes the tuner as easy to use and read, and praises its tuning performance and durable feel. Those impressions fit its adjustable 21-segment display, stated tuning accuracy and stompbox format, which may matter during practice and live use. Aggregate ratings are strongly positive overall, though ratings alone do not explain individual experiences.
- Positive themes: Customers report that it works well and is easy to use.
- Positive themes: Feedback praises the display's readability and the pedal's durability.
- Positive themes: Customers value its features for practice and live shows.

## Frequently asked questions

### Does the BOSS TU-3 mute the instrument signal?
Yes. The listing says the tuner automatically mutes the signal while the tuner is on, allowing silent tuning.
### Can the TU-3 tune extended-range instruments?
The listed Guitar/Bass mode supports 7-string guitars and 6-string basses.
### How far can it tune below standard pitch?
Guitar Flat mode supports drop tunings up to six semitones below standard pitch.
### Can the TU-3 power other pedals?
The listing says it can supply power to up to seven BOSS compact effect pedals through a daisy-chain connection.

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## Add-ons

- [MXR Patch Cable 6 in\|15 cm - 3 Pack \(3PDCP06\)](https://best-deals.pro/visit/boss-tu-3-chromatic-tuner-pedal)
- [Fender Professional Instrument Cable, Guitar Cable, Anti-Kink, 10ft, Black \| Electric guitar cable, stage-ready, anti-kinking design, durable connectors, low noise, live performance, 10 foot](https://best-deals.pro/visit/boss-tu-3-chromatic-tuner-pedal)

## Images

![BOSS TU-3 Compact Chromatic Tuner Pedal — 1](https://best-deals.pro/i/3Hl-wYhbD1Jh2LWYHl83cna1Yn_fTUJN_3xidaIfbe1_7_Lbghr5QhpPHuUy28XkTl9uw7jmRllkXyAcFE7ivH3EBlqXrrPROub7RTzyqyE4V6HDrl2IHqIF.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 2](https://best-deals.pro/i/B1R6gEfL1YzdbEAw6HxZnaryxt_GeNbkqWAu94-yFWHLkSoV8EcLOgUsUbTVYquf41-gI8tbWC1HEUvanHqoCoIIA52kxeCD-5O6xQOcDRs9molb2nZC9-IA.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 3](https://best-deals.pro/i/2-QDGueTsFhZgL1ZbVcrMKbETqkYRpmrGSts_bMij_zqFGZs3FkLKUgKxutEEPDZnao2BbP-2vh_4FzIMOV4erBMwGlzzo6v8LqzcL6qUT5lTIgpo9RWBwWb.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 4](https://best-deals.pro/i/eGQ5khWv_gwIIEwIxr6wCMhv-PEEP7DgOEjbPvPKmjPGJJ_mGaa0F6EBk4ljxvq7zQonJqeIcstdqiLa_T07hG_9v02qZhFNEZVCSoFBNICpM8jXmaO3WXhW.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 5](https://best-deals.pro/i/Pd3bwoMchAfbHixIhujv9JAgIkiZbJCwk40dYq5TUqDQjDxJlk_LYPHL9BANQp03Se2-3i1UPbagO0yYwK0BQ96XTJGit9DVClbuZS4EWyYzcQs8l-rkJjz_.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 6](https://best-deals.pro/i/2rySHCl0UGEToikNYqeXQizxHGpWN7lgHZiXN2Myog4xXHtR6ECkNIaPXOM8-OQYqRIXaBrttCbKs9U3cAgpWsXDP-Sff36aTrNWLeIUXOXQodOeF6LUlFJ-.jpg)

![BOSS TU-3 Compact Chromatic Tuner Pedal — 7](https://best-deals.pro/i/ZNp7XbELf9mTv16P3nSwCeafKIWBgTDnSIoXPddFkjHRQpMH8WoZjbS-XqfH3B_70L6tvvmne0wxfgvT2u2Hofz_d2LNC-Kl3TZ7mzqwjXFqQulgVWClw1as.jpg)