The Behringer TU300 is a chromatic tuner pedal for guitar and bass, built around a single footswitch that you stomp to begin tuning. Behringer markets it as the "TU300 Ultimate Guitar/Bass Tuner" and calls the chromatic tuner "an absolutely essential piece of gear"1. Guitar.com's beginner buying guide named it "Best tuner for beginners: Behringer TU-300"2.
What it does for your rig
A tuner pedal sits in your signal chain and shows you how far off pitch each string is, so you can tune silently on stage between songs. The TU300 does this with a footswitch rather than a button: to begin tuning, you simply stomp it1. A status LED tells you when the pedal is activated3.
The pedal offers two outputs, and which one you use decides whether it mutes your amp. The main Out jack allows you to cut the signal to your amp while you tune, or you can send a constant signal from the Bypass output1. Behringer also states that the solid electronic on/off switch maintains signal integrity in bypass mode1.
Tuning modes
The TU300 covers more than straight chromatic tuning. Behringer gives it 3 guitar modes (regular, flat, double flat), 3 bass modes (regular, flat, double flat) and a chromatic setting1. The flat and double-flat modes are for players who tune down a semitone or a whole tone, common in rock and metal, so the display reads the correct note names without you doing the maths.
| Mode set | Options |
|---|---|
| Guitar | Regular, flat, double flat3 |
| Bass | Regular, flat, double flat3 |
| Chromatic | Single chromatic setting1 |
Guitar.com's Pete Wise noted that "The TU-300 has some features that will come in handy as you branch out musically, including flat, double-flat and chroma"2.
Display and reading it on stage
The single-digit LED display shows which note it's reading, and Behringer says the 11-point stream guarantees accurate tuning1. Guitar.com's review describes "a digital display that tells you which note you're tuned to, and LED indicators that show whether the string is flat, sh[arp or in tune]"2.
For dark venues, Behringer says the TU300's super-bright display panel makes it easy to tune, "even in the darkest club!"1.
Power
You can power the pedal with a standard 9 V battery or Behringer's PSU-SB DC power supply1. The maker's page does not list a current draw figure for the TU300.
Behringer specifies its own PSU-SB DC power supply for the pedal1. If you run the TU300 on a shared pedalboard supply, match the 9 V requirement.
Where it sits among tuner pedals
The TU300 is one of many footswitch tuner pedals covered on the site's Tuner Pedals page. It competes in the same space as the Boss TU3 Tuner, the BOSS TU-3s Tuner, the Korg Pitchblack Chromatic Tuner and the TC Electronic PolyTune 3, among others. Guitar.com's guide placed it as its beginner pick among tuners2.
Videos
officialbreezer
Poor Man Pedals
officialbreezer
Questions
Does the Behringer TU300 take a battery?
Yes. Behringer says you can power the TU300 with a standard 9 V battery or with the company's PSU-SB DC power supply. That makes it usable without a pedalboard power supply, though a battery will need replacing eventually, and players running many pedals usually move to a DC supply.
What power supply does the Behringer TU300 use?
Behringer lists the PSU-SB DC power supply as the dedicated adapter for the TU300, running at 9 V. A standard 9 V battery also works. The maker's product page does not list a current draw figure for the pedal.
What is the difference between the Out jack and the Bypass output on the TU300?
The main Out jack lets you cut the signal to your amp while you tune, so the audience does not hear you tuning up. The Bypass output sends a constant signal, so the pedal can sit in the chain without ever silencing your amp. Choose one output depending on whether you want the mute function.
Does the Behringer TU300 have a bass mode?
Yes. The TU300 offers three bass modes, regular, flat and double flat, alongside three guitar modes with the same flat and double-flat options and a chromatic setting. Behringer markets it as an Ultimate Guitar/Bass Tuner for that reason.
Does the Behringer TU300 mute the signal while tuning?
It can. If you run the pedal from its main Out jack, that output cuts the signal to your amp while you tune. If you use the Bypass output instead, the signal stays constant and nothing is muted.
Can you read the Behringer TU300 display on a dark stage?
Behringer says the TU300's super-bright display panel makes it easy to tune even in the darkest club. The single-digit LED display shows which note it is reading, with an 11-point stream for accuracy.
Sources (3)
- TU300 | Behringer, Behringer
- The best guitar pedals for beginners: distortions, tuners and more, Guitar.com, 2026-06-05
- TU300 | Behringer, Behringer
