NUX has officially released the MG-400 GEN2 Firmware, bringing six major upgrades that significantly enhance the performance of the MG-400 multi-effects processor. Whether you're practicing at home, recording in the studio, or performing live on stage, GEN2 introduces new features designed to improve workflow, sound quality, and overall usability.

From an expanded WAH block and Dual-Engine Amp Modeling to NAM Loader support and Global TAP Tempo, this firmware update transforms the MG-400 into an even more powerful guitar processor.

What's New in MG-400 GEN2 Firmware?

The GEN2 firmware introduces several exciting features, including:

• 4 WAH Types

• 3 Deep Image Amp Models

• 10 NAM Loader Slots

• 5 Deep Image Effects

• Real-Time EQ dB Display

• Direct BPM Input

• Global TAP Tempo

These upgrades provide greater flexibility for guitarists in both live performance and studio environments.

1. WAH Block – Four WAH Types with Hold-to-Activate

The WAH block has been expanded with four different WAH types, allowing players to choose the perfect character for their playing style.

Activating the WAH is simple:

• Press and hold the PEDAL button.

• The built-in expression pedal instantly switches to WAH mode.

• No external expression pedal or additional cables are required.

The four WAH types cover a wide range of tones, including:

• Classic Cry Baby-style WAH

• Blues

• Funk

• Rock

• Modern Metal

This makes it easy to switch between volume control and expressive WAH performance using the onboard pedal.

2. Dual-Engine Amp Modeling

One of the biggest improvements in GEN2 is the introduction of Dual-Engine Amp Modeling, giving players access to two powerful amp simulation technologies.

Deep Image Amp

NUX's proprietary Deep Image technology delivers highly accurate amplifier modeling by recreating:

• Natural gain structure

• Dynamic response

• Harmonic richness

• Non-linear distortion characteristics

• Spatial air and depth

GEN2 includes:

• 3 Deep Image Amp models

NAM Loader

GEN2 also introduces support for Neural Amp Modeler (NAM).

The integrated NAM Loader allows users to import community-created amplifier models in the .nam file format, opening the door to virtually unlimited amp tones.

Features include:

• Support for up to 10 NAM slots

• Independent NAM models for different presets

• Easy expansion with community-created amp captures

Supported formats:

• .nam

• A2-Lite Native

• A1 Converted Models

3. Deep Image EFX

Deep Image technology now extends beyond amplifier modeling.

The EFX block receives five brand-new Deep Image effects, providing additional options for tone shaping and sound design.

These effects can be placed:

• Before the amp for extra drive and coloration

• After the amp for enhanced clarity and tonal refinement

This offers more creative flexibility when building custom signal chains.

4. Real-Time EQ dB Display

The EQ block now displays the exact boost or cut value (dB) for every frequency band in real time.

Instead of adjusting EQ by ear alone, users can now make precise tonal changes with numerical feedback.

Benefits include:

• Faster live adjustments

• More accurate studio mixing

• Easier preset creation

• Better consistency across patches

Location:

EQ Block → MODE Page

5. Direct BPM Input

Setting tempo has never been easier.

Instead of repeatedly tapping the TAP button, users can now enter BPM directly.

How it works:

1. Press and hold the TAP button.

2. Rotate the SELECT knob.

3. Choose any BPM between 40 and 240.

The selected tempo is automatically applied to all time-based effects within the current preset.

6. Global TAP Tempo

Another highly requested feature is Global TAP Tempo.

When enabled, the TAP tempo is shared across every preset, ensuring that delay and modulation effects remain synchronized while switching sounds during a performance.

To enable Global TAP:

SYSTEM MENU → PARA. FOLLOW → Global TAP → ON

This eliminates tempo interruptions during live performances and keeps every preset perfectly in sync.

GEN2 Firmware Feature Summary

Conclusion

The NUX MG-400 GEN2 Firmware is much more than a routine update—it introduces meaningful improvements that enhance both sound quality and workflow. With Dual-Engine Amp Modeling, Deep Image Technology, NAM Loader Support, Global TAP Tempo, and Direct BPM Input, the MG-400 becomes an even more capable and versatile multi-effects processor.

If you own a NUX MG-400, upgrading to GEN2 Firmware is highly recommended to unlock these powerful new features and take your guitar tone to the next level.

For more NUX firmware updates, product guides, guitar tone tips, and upcoming events in Indonesia, visit nuxaudio.id and stay connected with the latest from NUX

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