NUX MG-400 Multi-Effects Pedal

Sustainable product	not specified
expression pedal	yes
effect type	delay, equalizer, looper, reverb, wah wah
stereo input	yes
stereo output	yes
fx loop	yes
speaker/amplifier simulation	yes

true bypass	not specified
Voltage	9 V
current strength	not specified
Power supply plug	barrel 2.1 mm (inner diameter)
Centre positive/negative	centre negative
adapter included	yes
microphone input	no

Sustainable product	not specified
expression pedal	yes
effect type	auto-wah, booster, compressor, chorus, distortion, delay, flanger, fuzz, harmonizer, multi effect, noise suppressor, octaver, overdrive, phaser, reverb, tremolo, vibrato
stereo input	no
stereo output	no
fx loop	no
speaker/amplifier simulation	yes

true bypass	no
Voltage	9 V
current strength	100 - 499 mA
Power supply plug	barrel 2.1 mm (inner diameter)
Centre positive/negative	centre negative
adapter included	yes
microphone input	no

Sustainable product	not specified
expression pedal	yes
effect type	multi effect
stereo input	no
stereo output	yes
fx loop	no
speaker/amplifier simulation	yes

true bypass	not specified
Voltage	9 V
current strength	not specified
Power supply plug	barrel 2.1 mm (inner diameter)
Centre positive/negative	centre negative
adapter included	yes
microphone input	no

NUX MG-400 Multi-Effects Pedal
Product no: 9000-0102-4619 Bax Music Warranty: This product comes with a 3-year warranty.

General

The NUX MG-400 is a compact multi-effects pedal loaded with two powerful DSP chips for a host of options for electric guitarists, acoustic string-pickers and even bassists, including 25 guitar amp simulations, 25 guitar speaker cabinets, four microphones, three acoustic guitar IRs and a bass guitar amplifier that gives you the pick of eight bass speaker cabs. As if that wasn't enough, more third-party IRs can be loaded in via the free downloadable software and the fitted USB port, which also serves to connect this NUX multi-effects pedal to a computer so it can be used as an audio interface for recording guitar or bass parts to your DAW of choice.

The MG-400: Ample Adjustable Settings and Sounds

Equipped with various controls and a clear, 2.8" full-colour display, the MG-400 is easy to use. Aside from the built-in emulations, it sets you up with ample user slots, adjustable settings and various effects, including modulation, reverb and delay. The ten 'signal blocks' can be individually arranged and, when you frequently tweak the effects, the PARA. FOLLOW function will conveniently keep track of your habits. Want to assign the parameters of a certain effect to a pedal? That's easy: simply use the built-in expression pedal.

Tips or comments about this product

Downloadable firmware for macOS and Windows.
Downloadable software for Mac OS and Windows.
Downloadable drivers for Windows 7 and Windows 10.

Specifications

Product features

Adapter included	yes
Centre positive/negative	centre negative
Sustainable product	not specified
Effect type	chorus, delay, equalizer, flanger, noise suppressor, phaser, reverb
Expression pedal	yes
Fx loop	no
Speaker/amplifier simulation	yes
Microphone input	no
Stereo input	no
Stereo output	yes
Current strength	100 - 499 mA
True bypass	not specified
Power supply plug	barrel 2.1 mm (inner diameter)
Voltage	9 V

Weight and dimensions including packaging

Weight (incl. packaging)	1,7 kg
Dimensions (incl. packaging)	38,0 x 21,5 x 11,0 cm

Product specifications

NUX multi-effects pedal
model: MG-400
controls:
- master
- select
- 1
- 2
- 3
switches:
- power
- up
- down
- ctrl 1 (loop)
- ctrl 2 (drum)
- edit/exit
- save
- mode
- jam
- tap
- pedal
- <
- ctrl
- >
Dual 32-Bit-DSP Engine (NXP RT)
2.8 inch full colour display
built-in expression pedal
looper function
audio interface with ASIO-driver
Quick Tone Edit software
512 sample IR-resolution
user slot for every patch (12 additional IR collection slots)
white-box amp modelling & pre-efx algorithm for realistic playability and analogue chaos response
5 output modes with global 3-band EQ
PARA. FOLLOW function
speaker simulations:
- 25 guitar amplifiers
- 25 speaker cabinets
- 4 microphones
- IR loader
- 1 bass guitar amplifier with 8 speaker cabinets
- 3 acoustic guitar IRs
10 independently movable signal blocks:
- NG
- CMP
- EFX
- AMP
- IR
- EQ
- MOD
- DLY
- RVB
- P.L
connections:
- 1x 6.35mm mono-jack input
- 2x 6.35mm mono-jack output
- 3.5 mm jack aux in
- 3.5 mm phones
- USB
power supply: 9V DC (included), <280mA
latency: 1.1 ms
AD/DA converter: 48kHz / 32 bit
dynamic range: 108 dB
dimensions: 28.9 x 16 x 7.1cm
weight: 920g
included: power pack

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Reviews from other countries

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Stef September 15, 2025

Wrote the following about NUX MG-400 Multi-Effects Pedal

Heb deze nu twee week in mijn bezit en ben onder de indruk van de voorgeprogrammeerde sounds. Ik heb al een eigen drum en loop pedaal, dus daarvoor heb ik het niet gekocht, enkel de effecten. Lcd scherm is duidelijk, knoppen voelen logisch en pedaal voelt stevig. Ik heb me via youtube reviews laten overtuigen van de mogelijkheden van dit toestel, zeker voor deze prijs in vergelijking met concurrenten. Top.

Grateful Dead Fan July 4, 2023

Wrote the following about NUX MG-400 Multi-Effects Pedal

Ik had dit product aangeschaft, maar toch netjes geretourneerd voor de Mg30 vanwege de metalen behuizing en 'iets' meer mogelijkheden.
Maar ook dit is een apparaat met ontiegelijk veel mogelijkheden. De behuizing is van kunststof maar het voelt wel degelijk aan. Geluidskwaliteit is goed.
Via de Nux website kun je een programma downloaden waarmee je zelf makkelijk controle hebt over alle geluidsinstellingen. Je kan alle voorgeprogrammeerde geluiden aanpassen of hernoemen, De originele versies blijven ook altijd beschikbaar.
Prachtig apparaat en zeker voor de prijs.