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Firmware Update GEN2
[Notice] The (V2) firmware version is ONLY compatible with (V2) QuickTone™ Editor Software.
Read More
Firmware updates shouldn’t be footnotes. MG-400 GEN2 is a direct answer to how working guitarists actually use a multi-effects processor on stage and in the studio — from WAH control logic to amp modeling depth to global tempo management.
Long Press PEDAL → WAH Mode · 4 WAH Types Available
Hold the PEDAL button and the MG-400’s built-in expression pedal instantly switches to WAH mode. No external pedal required. No extra cables.
GEN2 expands the WAH selection to 4 types, covering the full spectrum from classic Cry Baby character to modern wide-band WAH — Blues, Funk, Rock, and Metal all represented.
ACTIVATION
Hold PEDAL button
WAH TYPES
4 (new in GEN2)
CONTROL
Onboard Expression Pedal
02
AMP Block
Dual-Engine
Amp Modeling
Deep Image Amp ×3 · NAM Loader ×10 · Dual-Engine Architecture
GEN2 introduces a dual-engine architecture in the AMP block. NUX Deep Image delivers precision-modeled amp characters with accurate harmonic structure and dynamic response. NAM Loader opens the door to the community-driven Neural Amp Modeler ecosystem.
Deep Image Amp ×3 — NUX’s proprietary DSP-based modeling technology, capturing an amp’s gain structure, non-linear distortion characteristics, and spatial air.
NAM Loader ×10 — Load community-shared Neural Amp Modeler (.nam) model files. 10 slots let you configure different NAM tones independently across presets.
DEEP IMAGE AMP
3 Types
NAM LOADER
10 Slots
NAM FORMAT
.nam (A2-Lite NATIVE, A1 CONVERT)
03
EFX Block
5 New Types.
Deep Image EFX.
EFX Block · Deep Image Technology · 5 New Effect Types
Deep Image technology extends into the EFX block. GEN2 adds 5 new Deep Image-based effects, expanding your tonal shaping options beyond drive and distortion into new dimensions of character and texture.
Whether placed pre-amp for push and color, or post-amp for sonic refinement, the new Deep Image EFX types integrate seamlessly across the signal chain.
New EFX Types
5 (Deep Image)
Technology
NUX Deep Image
04
EQ · MODE
See What
You Hear.
EQ Block · Real-Time dB Value Display · Output Mode
GEN2 adds real-time dB value display to the EQ block’s MODE page. Every band’s boost or cut is shown numerically — no more approximating by feel.
Essential for studio precision and equally valuable for fast stage adjustments when every second counts.
New Feature
Per-band EQ dB display
Location
EQ Block → MODE page
05
TAP · BPM
Hold TAP.
Set Your Tempo.
Hold TAP Key → Direct BPM Input · Range 40–240 BPM
Hold the TAP key to enter direct BPM input mode. Set any value from 40 to 240 BPM — from slowest ballad to extreme metal tempo — without repetitive tapping.
1. Hold the TAP button → enter direct BPM input mode
2. Rotate the SELECT knob to dial in your target BPM (40–240)
3. Value auto-applies to the current preset’s time-based effects
Activation
Hold TAP button
BPM Range
40 – 240 BPM
06
SYSTEM · PARA. FOLLOW
Global TAP.
One Pulse, Every Preset.
System Menu → PARA. FOLLOW → Global TAP ON/OFF · Press SELECT to Toggle
Navigate to SYSTEM MENU → PARA. FOLLOW to find the new Global TAP toggle. When enabled, the TAP BPM syncs across all presets’ Delay and Modulation effects.
Live performance breakthrough: set your tempo once and every preset stays locked — no more broken grooves when switching sounds mid-song.
1. Enter SYSTEM MENU → Navigate to PARA. FOLLOW
2. Press the SELECT knob to toggle Global TAP ON / OFF
3. TAP BPM now applies globally across all preset time-based effects
Location
SYSTEM MENU → PARA. FOLLOW
Toggle
Press SELECT knob
Scope
All Presets · Delay + Modulation
FAQ
Q How do I update the MG-400 to Firmware GEN2?
Connect your MG-400 via USB and use the official NUX NMP software (NUX Multi-Effects Software) to install the update. Always back up your presets before proceeding — the update process itself does not erase presets, but it’s good practice.
Q What is the difference between NAM Loader and Deep Image Amp?
NAM (Neural Amp Modeler) is an open-format machine-learning amp modeling standard. The NAM Loader lets you import community-created .nam files. Deep Image is NUX’s proprietary high-precision amp modeling engine. They’re complementary: Deep Image offers maximum accuracy for specific characters, NAM Loader offers virtually limitless expansion.
Q Does the WAH block require an external expression pedal?
No. The MG-400 has a built-in expression pedal. Hold the PEDAL button to activate WAH mode and use the onboard pedal to control sweep. GEN2 includes 4 WAH type options.
Q What exactly does Global TAP do?
With Global TAP enabled, the tempo set via TAP (or direct BPM input) is applied to all presets’ time-based effects simultaneously. Switching presets mid-performance will no longer break tempo sync across Delay and Modulation.
Q What is the BPM range for direct input mode?
Hold the TAP button to access direct BPM input. You can set values from 40 to 240 BPM, covering ballads, blues shuffles, rock, and extreme metal tempos.
Based on the successful entry-level MG-300 MKII, the NUX MG‑400 is a powerful dual-DSP guitar and bass modeler in a compact floorboard positioned to be "The Best Value Modeler" in the market.
It features high-definition amp modeling, 10 flexible signal blocks, 3 scenes per preset, a built-in phrase looper, and USB recording/re-amping. With 512-sample IRs and an intuitive 2.8″ color LCD, it delivers studio-quality tone for practice, recording, or live performance.
Advance Amp Modeling
TSAC‑HDwhite-box technology provides realistic tube-amp tones with responsive dynamics.
Focused Amp Models
Features36 high‑quality amp models: 28 electric guitar amps, 3 acoustic amp models, and 8 bass amps.
Impulse Response (IR) Support
Includes legendary preset cab IRs for wide range of uses plus the ability of supporting up to 12 3rd-party IR.
Built-In Looper & Drum Machine
Record, overdub, and layer tones with dynamic drum backing tracks for building riffs, testing tones, or performing solo sets.
Block‑Style Effects & Routing
10 independent moveable signal blocks (NG, CMP, EFX, EQ, MOD, DLY, RVB, etc.) for a more customizable signal chain.
QuickTone™ Editor Support
Edit amp models and effects, manage presets, load IRs, and configure USB‑C routing for recording or streaming.
NUX MG-400
Unmatched Value for a Modeler
Packs pro-level amp modeling, dual-DSP processing, effects, looper, and USB recording into a single floorboard—making it the best value modeler on the market.
NUX's TSAC-HD "White-Box" Amp Modeling
Tech at a glance →
NUX's TSAC‑HD (True Simulation of Analog Circuit – High Definition) technology recreates the behavior of classic tube amplifiers with stunning realism. Unlike simple digital modeling, NUX's white-box approach simulates the actual circuit response of each amp, capturing the dynamic feel, warmth, and touch sensitivity of analog gear.
Dual DSP processors
One dedicated to amp modeling and the other to effects, the MG-30 delivers high-quality amp and cab simulations, multiple effects chains, and long impulse responses simultaneously without degrading performance.
Ultra-low 2ms latency
Responds instantly to every note and nuance, giving you the natural, real-time feel of playing through a traditional amp — whether you’re performing live or recording in the studio.
Top-Shelf Amp Tones, Digitally Perfected
Combined with the MG-400 amp modeling and effects, these IR options give you flexible, realistic sound for practice, recording, or live use.
30 Amp Models Included
27 for guitar, 1 for bass, and 2 for acoustic amp models to enjoy.
36 Built-in Cabinet IRs
25 for guitar, 8 for bass, and 3 for acoustic—designed to capture the character of real legendary cabinets.
512-sample (IR) support
Process high-resolution IRs that capture microphone placement, room reflections, and cabinet character, delivering realistic amp tones.
Expandable IR library (Up to 12)
Upload up to 12 of your own third-party IRs, giving you plenty of tonal possibilities.
Legendary mic & mic positions
4 microphones × 3 positions each give you full control over tone, depth, and presence.
Fully Customizable Signal Block Routing
Whether you prefer a traditional setup or want to experiment with new combinations, you can freely move each block to create the signal chain that works best for your stylevia the Quicktone™ Editor App.
Straightforward Controls
Easy-to-read LCD display and simple front-panel knobs let you adjust amp models, effects, and parameters quickly—no deep menu diving required.
Full-Color LCD Display
Easy-to-read screen shows amps, IRs, effects, and signal chains at a glance, making navigation fast and intuitive even in low-light or live settings.
Physical Master Volume Knob
Adjust your overall output in real time with the physical master volume knob for better hands-on control while performing.
Select Knob For Simple Menu Scrolling
Navigate through patches, scenes, and settings quickly with a single rotary knob.
Tweak amp settings, effects, and tone parameters directly for real-time control without having to dig through menus.
Expression Pedal w/ Toe Switch
Control wah, volume, or other effect parameters on the fly, with a built-in toe switch for added convenience.
Footswitches For Preset Switching
Effortlessly switch between presets or jump between three scenes within a preset while playing
Simple, Versatile I/O
Flexible, straightforward I/O that makes recording, streaming, and everyday playing easy.
Unlock the Full Potential of Your Rig
Quickly edit amp models, effects, and signal blocks, manage presets and scenes, and load your own IRs. Configure USB routing for recording or streaming with ease. QuickTone™ makes designing, organizing, and personalizing your tone simple and intuitive.
QuickTone™ Editor Feature →
Desktop Software for Tone Customization
When you tweak the physical knobs or effect parameters in the app, QuickTone reflects those changes in real time — giving you visual feedback for what you’re doing.
Real‑Time Interaction
When you tweak the physical knobs or effect parameters on your pedal, QuickTone reflects those changes in real time — giving you visual feedback for what you’re doing.
Preset Organization
You can organize and manage your patches and “Pro Scenes” (for switching within a patch) via the app
Custom IR Loading
You can import your own impulse response (IR) files into the 24 user-loadable IR slots available in the MG‑300 MKII.
Block Routing Control
QuickTone allows you to reorder signal blocks (amps, effects, IRs) easily, giving you flexible control over how your signal chain is structured.
USB Routing Configuration
QuickTone supports different USB‑C audio routing modes, like NORMAL, USB Loopback, REAMP, and DRY OUT
Backup & Safety
Helps you create backups of your patches, so you’re less likely to lose your settings if you update firmware or change hardware setups.
Firmware Updates
Keep your unit up-to-date with the latest features and improvements.
What's Included
1 x MG-400 MKII, 1 x Power Adapter, 1 x USB-C Cable, User Manual
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