NUX MG-300 Modeling Guitar Processor - MkI version

The NUX MG-300 MkII was recently voted by Guitar World as the best budget modeler of 2026. This brand new in-box MkI pedal is available at a special savings.

With the MG-300, NUX packs a lot of real-world usefulness into a compact and very affordable modeling processor. It brings together technology from the Core and Verdugo series, adds TSAC amp modeling, and includes a built-in looper with eight rhythm styles and seven beat patterns. Whether you’re practicing, recording, or heading to a gig, the MG-300 gives you a wide range of tones and tools in one easy package. For about the price of a typical pedal, it delivers impressive flexibility, convenience, and serious bang for the buck.

In the words of NUX:

Dollar-for-dollar, the best multi-efx on the market. Our dream was to develop a compact and versatile multi-efx pedal at the right price. We understand that both beginners and working musicians are looking for compact size and great sound at an affordable price. This was a big challenge, and we’re proud to say we did it!

We’ve all experienced digital pre-effect pedals that belong on the Wall of Shame – especially Overdrive. Modelers of this kind used the linear algorithm which doesn’t provide negative-feedback for dynamic playability. 

Enter the NUX MG-300, the modeler that will totally blow your mind! 

The pre-effect block beautifully recreates the awesome signature sound of real analog overdrive / distortion pedals.

In 2010 NUX introduced TSAC (True Simulation of Analog Circuit) with the sole intention of bringing Amp Modeling to a whole new level. The DSP industry has been evolving at breakneck speed, and keeping up can be a challenge. We were impressed that a product like the Fractal® AXE-FX had the foresight to use a high-definition TSAC (white-box) algorithm to do its Amp Modeling. So we took note and started development on an affordable modeler with TSAC-HD.

The concept of “Chaos makes the muse” perfectly applies to the analogue circuit. When you tweak the knob, it affects itself as well as other parameters. For a linear digital system, the parameter is independent. The white-box algorithm offers real negative-feedback, increment-by-increment. NUX TSAC-HD replicates the same playability most guitarists prefer in a real tube amplifier.

Building a sky-high priced product is easy. The art of building an affordable product is a real challenge. We priced the MG-300, with a straightforward high-performance algorithm to not only fit this specific DSP platform, but dominate the multi-efx platform in general.

NUX built the popular Mini Core Series and the Verdugo Series (post effects) using Core Image Technology. Now MG-300 provides you with the same sound library - including all the classic Chorus, Flanger, Phase, Vibe, Rotary, Vibrato, and more.

If you have tried out the Cerberus or Atlantic, you know NUX's impressive Delay and Reverb sound. MG-300 offers even more new models and algorithms with Core Image technology. It also provides sub-division and tap tempo to make your tone more musical.

Just like the iconic sound of NUX's Atlantic reverb algorithm, MG-300 adds Room for small environment reflection. Simple operation with great sound is our mission. Try it… you'll love it!

MG-300 supports NUX Phrase Loop Synchronization with Rhythm – a breakthrough technology derived from the popular NUX Loop Core Stompbox and later the JTC Pro Drum & Loop. Every guitarist has his/her own funky way so a truly versatile drum & looper is indispensable. MG-300 has 8 rhythm styles, each style has 7 different beats. You can play the rhythm then record your phrase loop. MG-300 will automatically amend the phrase to fit the current rhythm BPM.