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Resources
For product how-to guides, walkthroughs, user manuals, and software downloads, check out ourNUX product support page.
The NUX MG-300 MKII is a straightforward, compact modelling guitar processor that brings studio-level tone and flexibility into any setup — whether live on stage, streaming online or recording at home. Featuring the advanced TSAC-HD white-box amp-modelling algorithm, full effects suite, user-loadable IRs, looper/drum-machine functions, and seamless USB-C and TRRS connectivity, it’s designed for modern players who demand pro performance in a pedalboard-friendly footprint.
Advance Amp Modeling
TSAC‑HD white-box technology provides realistic tube-amp tones with responsive dynamics.
Focused Amp Models
Features 36 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 24 3rd-party IR.
Block‑Style Effects & Routing
10 independent moveable signal blocks (NG, CMP, EFX, EQ, MOD, DLY, RVB, etc.) for a more customizable signal chain.
Built-In Looper & Drum Machine
Record, overdub, and layer tones with dynamic drum backing tracks for building riffs, testing tones, or performing solo sets.
QuickTone™ Editor Support
Edit amp models and effects, manage presets, load IRs, and configure USB‑C routing for recording or streaming.
NUX MG-300 MKII
Your First Step into Tone Mastery.
Start simple, explore more, and let your tone evolve with the MG‑300 MKII.
Tech at a glance
TS/AC-HD
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.
Top-Shelf Amp Tones, Digitally Perfected
Combined with the MG-300 MKII’s amp modeling and effects, these IR options give you flexible, realistic sound for practice, recording, or live use.
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 24)
Upload up to 24 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 style via 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.
Select Knob For Simple Menu Scrolling
Navigate through patches, scenes, and settings quickly with a single rotary knob.
Three Front-Panel Parameter Knobs
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.
Simplified Streaming Setup
The MG‑300 MKII makes live streaming easy, sending studio-quality guitar tones to your computer or smartphone via USB‑C, with TRRS headset input for vocals or commentary.
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
Instead of navigating small screens or multiple menus on the floor unit, you can see the full signal chain, blocks, IRs and amps at once on your computer.
Real‑Time Interaction
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.
Preset Organisation
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.
Specifications
Technical
- Sampling Frequency 48kHz / 32bit
- Input Impedance 1 MΩ
- Output 1 Impedance 1 kΩ
- Frequency Response 20Hz-20000Hz +1dB
- Dynamic Range 110 dB
- System Latency <2ms
Connectivity
- Input 1 1/4" (6.8 mm) jack
- Send/Return 1/4" (6.8 mm) jack
- Aux Input 1/8" (3.5 mm) mini jack
- Phones Out (TRRS) 1/8" (3.5 mm) mini jack
- USB USB-C
Hardware
- Dimensions 9.49 × 6.30 × 1.93 inch
- Weight 1.68 lb
What's Included
1 x MG-300 MKII, 1 x Power Adapter, 1 x USB-C Cable, User Manual