MXR Turbo Tuner M400 Strobe Pedal

The MXR Turbo Tuner is MXR's first tuner, built around the core engine of the original Sonic Research Turbo Tuner. Its large strobe display tracks pitch with fraction-of-a-cent accuracy and no lag, so you can see exactly how close you are and tune in seconds, on stage or in the studio.

Choose from chromatic mode or five customisable presets, including guitar and bass modes that show string numbers, and three preloaded tunings. Each preset can be set up for up to 12 strings with ±50-cent offsets. True bypass is the default, with a switchable buffered bypass for long cable runs. A 9V passthrough output powers another pedal on your board, and USB-C handles firmware updates.

Specifications

• Type: Strobe tuner
• Accuracy: Fraction of a cent
• Modes: Chromatic, Guitar, Bass, and five customisable presets (up to 12 strings each, ±50 cents)
• Bypass: True bypass (default), switchable buffered bypass with three submodes
• Power: 9V DC, negative centre, 73 mA
• Outputs: 9V DC passthrough
• Connectivity: USB-C for firmware updates and editor software
• Display: Strobe display with four brightness levels
• Dimensions: 65 mm wide × 112 mm high