The NUX MG-400 is a value-packed modeler, building upon the acclaimed MG-300. It features two powerful DSP chips for high-definition White-Box Amp Modeling (TS/AC-HD) and Core-Image post-effects. Praised for its sound, playability, and intuitive interface, the MG-400 enhances these features with movable signal blocks, 12 IR COLLECTION slots, a flexible P.L block with MIN & MAX parameter setup, an abundant SYSTEM MENU, and a physical MASTER volume knob, making it an excellent value for musicians.

• TSAC-HD White-Box Amp Modeling: The MG-400 utilizes the same advanced White-Box Amp Modeling algorithm as the MG-300, offering realistic playability and analog-chaos response. This technology precisely replicates the interdependent and feedback-responsive behavior of analog circuits, providing the nuanced control guitarists seek in tube amplifiers.
• Impulse Response (IR) Capabilities: The MG-400 includes multiple 512-sample IRs. It comes with 25 guitar cabinet IRs (combining 4 classic microphones with 3 mic positions), 8 bass cabinet IRs, and 3 acoustic guitar IRs. Users can also load third-party IR files up to 48kHz via the NUX QuickTone edit software, with an additional 12 IR COLLECTION slots for expanded tonal customization.
• 10 Independent Flexible Blocks: The MG-400 offers 10 independent and movable signal blocks (NG, CMP, EFX, AMP, IR, EQ, MOD, DLY, RVB, P.L). These blocks can be freely arranged for extensive tone creation. Firmware V2.1.1 further enhances flexibility, allowing swapping between CMP<-->EFX, EFX<-->MOD, MOD<-->EFX, and RVB<-->DLY, enabling stacking of effects like two delays or two overdrives/distortions.
• 2.8” Color LCD with Intuitive UI: A vibrant 2.8” (320x240) color LCD display provides an intuitive user interface, simplifying tone tweaking and navigation without the need for extensive manual reading.
• Scene Functionality: Each preset features 3 scenes, acting as snapshots within the preset, which can be assigned to CTRL1 or CTRL2 footswitches. This powerful function for live gigs allows engaging/disengaging signal blocks freely within each scene, while retaining DELAY / REVERB trails when disengaged.
• Jam (Drum & Looper): The MG-400 supports NUX Phrase Loop Synchronization with Rhythm, allowing automatic beat matching of recorded phrases to the current rhythm BPM. It offers both STEREO (30 seconds) and MONO (60 seconds) looping, and two recording modes: Normal Recording (regular loop function) and Auto Recording (starts recording upon hitting strings).
• Editor Software (QuickTone™): The QuickTone™ editor software provides an intuitive interface for tweaking parameters, dragging block order, setting up scenes, saving/loading/exporting patches, loading IRs, setting up USB routing, and configuring CTRL SETTING, all for total editing control.
• USB Audio Interface: The MG-400 functions as a versatile USB audio interface for home studio recording, silent practice, re-amping, and livestreaming. In Normal mode, Loopback can be selected to play back audio from the PC during live streams, and it offers dedicated Dry Out and Re-amp recording applications.