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The NUX MG-400 Modeling and Bass Guitar Processor delivers powerful amp/cab modeling, versatile effects, USB/MIDI integration, and performance-boosting tools — offering dynamic tone shaping and professional flexibility for bassists and guitarists alike.Home
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The NUX MG-400 Modeling and Bass Guitar Processor is a professional-grade multi-effects and modeling unit designed for bassists and guitarists who crave rich tone, versatile sound shaping, and road-ready performance. Engineered with advanced digital modeling technology, the MG-400 replicates classic and modern amp, cabinet, and effect tones — giving you studio-quality sound without bulky rigs. Whether you’re performing live, tracking in the studio, or practicing at home, this processor delivers expressive dynamics, authentic character, and powerful performance.
Equipped with a comprehensive suite of built-in effects including distortion, modulation, delay, reverb, and compression, the MG-400 lets you sculpt your sound with precision and creativity. Its intuitive interface and dedicated control knobs make editing patches and dialing in tones fast and simple. Dual footswitches provide seamless preset switching and onboard control during performance, while the durable, compact housing stands up to gigging demands.
With USB audio/MIDI connectivity, the MG-400 easily integrates with recording software and DAWs for direct tracking or software control. Record dry and processed tracks, expand your library with custom IRs, and use your processor as an audio interface — unlocking modern workflow flexibility. Additional tools like the built-in tuner, looper, and preset memory further enhance your practice, performance, and creative capabilities.
The NUX MG-400 Modeling and Bass Guitar Processor blends premium tone modeling, flexible effects, and practical performance features — making it an essential tool for modern bass and guitar players who want professional sound and creative freedom.

The NUX MG-400 offers advanced amp, cab, and effect modeling to provide authentic, expressive tones for both bass and guitar. Its powerful digital engine recreates classic and modern rigs without the need for pedals or tube amps, giving players studio-quality sound in a single processor.

Featuring distortion, modulation, delay, reverb, compression, and more, the MG-400’s effects allow expansive sound design. Easily blend and tweak effects with intuitive controls to create signature tones ideal for rock, funk, metal, jazz, or electronic music.

With USB audio and MIDI connectivity, the MG-400 integrates seamlessly with DAWs and recording workflows. Record direct, use software editors, and expand your sound palette — perfect for studio production, live playback, and creative sessions.
| Specification | Details |
|---|---|
| Modeling Engine | Advanced digital modeling |
| Effects | Distortion, Modulation, Delay, Reverb, Compression |
| Inputs | 1/4″ Instrument Input |
| Outputs | Main Out (L/R), Headphone Out |
| USB | USB Audio/MIDI |
| Controls | Knobs, Buttons, Display |
| Tools | Tuner, Looper, Preset Memory |
| Power | External Adapter |
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