The MXR M400 Turbo Tuner brings hyper-fast, rock-solid accuracy and Tour-Grade durability to your pedalboard in a compact, road-ready footprint.
Designed for gigging guitarists, studio players, and touring musicians who need precise tuning without slowing down their set, this high-performance stompbox features a lightning-quick response time and an exceptionally clear display.
Whether you require standard chromatic tuning for quick stage adjustments or ultra-fine strobe tuning for exact studio intonation, the Turbo Tuner delivers total pitch control when every cent counts.
Dual High-Precision Tuning Modes
Equipped with both Chromatic and Strobe tuning modes, the Turbo Tuner adapts instantly to your environment. Chromatic mode provides rapid visual tracking ideal for fast on-stage tune-ups between songs, while Strobe mode unleashes hyper-accurate +/-0.1 cent precision. This extreme level of accuracy makes it an essential tool for setting up instrument intonation, recording critical studio tracks, and maintaining absolute pitch stability across alternative tunings.
High-Visibility Multi-Colour Display
Featuring a bright, multi-colour LED screen, the display provides clear, instant visual feedback regardless of your lighting environment. The vibrant readout remains effortlessly readable on sunlit outdoor festival stages, inside dark venue spaces, and under intense stage lighting rigs, ensuring you spend less time squinting at your pedalboard and more time performing.
Selectable True Bypass & Buffered Bypass
To suit any pedalboard arrangement, the Turbo Tuner includes selectable signal routing options between True Bypass and Buffered Bypass. True Bypass ensures complete signal transparency, bypassing all internal circuitry to keep your guitar tone entirely uncoloured when the pedal is off. Switching to Buffered Bypass maintains high-frequency clarity across long cable runs and complex, multi-pedal signal chains.
Flexible Reference Pitch & Alternate Tuning Drop Modes
Built to handle complex performance setups, the pedal offers adjustable A4 reference pitch calibration from 438Hz to 445Hz, making it easy to align with acoustic pianos or orchestral instruments. Additionally, built-in flat/drop tuning modes allow you to tune down up to six semitones without calculating transposed pitch names in your head, perfect for players using detuned or heavy-gauge drop setups.
A dependable, highly accurate choice for touring professionals, studio engineers, and gigging players, the MXR Turbo Tuner earns its place on any serious pedalboard setup.
MXR M400 Turbo Tuner Specifications
- Effect Type - chromatic and strobe tuner pedal.
- Instrument Compatibility - electric guitar, bass guitar, and electro-acoustic instruments.
- Tuning Accuracy - +/- 0.1 cent accuracy in Strobe mode.
- Tuning Modes - Chromatic and Strobe.
- Display Type - high-visibility multi-colour LED display.
- Bypass Options - selectable True Bypass and Buffered Bypass.
- Reference Pitch Calibration - adjustable A4 frequency from 438 Hz to 445 Hz.
- Drop Tuning Options - up to 6 semitones flat tuning.
- Inputs - 1/4" instrument jack.
- Outputs - 1/4" output jack.
- Power Supply - 9V DC centre-negative (power supply not included) or 9V battery.
- Enclosure - heavy-duty metal chassis.