The NU-X MG-400 is a full-featured multi-effects pedal built on dual processors and NU-X's TSAC-HD algorithm — a high-definition analogue circuit simulation engine that delivers professional-quality amp and effect modelling. It builds on the MG-300 with increased processing power, greater flexibility, and an expanded control surface for smoother live use.

Integrated effects sections cover Drive, Amp Simulation, IR Cabinet Simulation (12 importable IRs), Modulation, Delay, and Reverb. An expression pedal handles wah, swell, and other assignable functions. All settings can be edited on the unit or via the free Quicktone software for PC/Mac over USB, and stored in one of 36 internal memory locations.

A built-in Jam section includes a fully featured drum machine and phrase looper for live or rehearsal backing. The USB connection also functions as a high-quality audio interface for direct DAW recording. Output options include stereo or mono for guitar amplifiers or DI to studio equipment, plus a 3.5mm stereo headphone output.

• Dual processors with TSAC-HD amp & effect modelling
• Drive, Amp Sim, IR Cab Sim, Modulation, Delay & Reverb sections
• 12 importable IR cabinet simulations
• Expression pedal + 2 programmable control footswitches
• 36 internal memory locations
• Built-in drum machine and phrase looper
• USB audio interface + Quicktone PC/Mac editor
• Stereo or mono output + 3.5mm headphone output
• Requires 9V DC power supply (not included)