Loop Core Stereo Firmware V2.0.0
GEN 2
MG-400 GEN2 Firmware
Six core upgrades. Every press, every tone, every beat — refined.
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.
4
WAH Types
3
Deep Image Amp
10
5
Deep Image EFX
Contents
01
WAH Block
4 Types.
Hold to Activate.
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 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
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
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
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
Toggle
Scope
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.