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Multi-Effects · NUX

NUX MG-400

The NUX MG-400 is a digital multi-effects floor unit featuring dual DSP engines, an integrated looper, and extensive connectivity for both stage and studio use. It functions as an audio interface and includes an IR loader for amp modeling.

  • 9V DC · center −
  • 280 mA
  • Digital
New
from $183.85
Used (asking)
from $168.41

The rundown

Highlights

  • Dual DSP processing engines with color display
  • Extensive amp and effects selection
  • Built-in looper and audio interface functionality
  • Large footprint at 289.1 x 162.8 mm
  • Includes software editor for preset management

Best for

Guitarists seeking a comprehensive multi-effects solution that combines stage performance capabilities with studio recording functionality.

Professional reviews

What the press rated it. We link to each review; read the full piece for the details.

Quick facts

Power
9V DC
Current draw
280 mA
Polarity
Center negative
Dimensions
289.1 × 162.8 mm
Status
In production

Where to buy NUX MG-400

$183.85 lowest new price · Reverb

Used listings asking $168.41–$191.87, median $184.05 (2 listings, small sample). Asking prices, not sold prices.

Current offers
SellerConditionPriceLink
ReverbUsed$168.41View
ReverbNew$183.85View
ReverbNew$189.91View
ReverbUsed$199.69View
ReverbNew$199.99View
ReverbNew$209View
ReverbNew$219View
ReverbNew$219.99View
ReverbNew$227.04View
ReverbNew$229View

Prices last checked 21 hours ago. Links to sellers are affiliate links.

Frequently asked questions

What power supply does the MG-400 require?

The NUX MG-400 runs on a 9V DC supply with 280 mA current draw and center-negative connector.

Can the MG-400 be used as an audio interface?

Yes, the MG-400 functions as an audio interface according to MusicRadar's review.

Does the MG-400 have an expression pedal?

The MG-400 includes an expression pedal, though MusicRadar noted it can be overly sensitive.

Similar pedals

Same type, similar features.

Specs from pedalfilter. Summary written by PedalBro from those specs and public descriptions.

Page last updated September 29, 2026.