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NUX Mighty 20 MKII 20-watt 1 x 8-inch Modeling Combo Amp

Item ID: Mighty20mk2
NUX Mighty 20 MKII 20-watt 1 x 8-inch Modeling Combo Amp
NUX Mighty 20 MKII 20-watt 1 x 8-inch Modeling Combo Amp
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NUX Mighty 20 MKII 20-watt 1 x 8-inch Modeling Combo Amp Reviews

20W, 1-channel, 1 x 8" Modeling Guitar Combo Amp with 17 Amp Models, FX, 7 Presets, Phrase Looper, Drum Machine, USB Routing Options, Bluetooth, and Mighty Amp App Interface

Whether practicing in the bedroom, jamming at rehearsal, or storming the stage, the NUX Mighty 20 MKII covers all bases. Kicking things off, this combo amp is essentially like having 17 amps in one. NUX’s White Box Amp Modeling Algorithm faithfully re-creates 17 of the most iconic amps in music history, from those responsible for that classic British crunch to those that blast face-melting metal tones. You also have access to a whole arsenal of effects, including multiple styles of dirt, delay, reverb, chorus, gate/comp, and more, to assist you in dialing in your exact tone. Likewise, seven presets, three Pro Scenes per preset, and access to the Mighty Amp app interface make adjusting, saving, sorting, and switching between saved sounds a total cinch. Sound-wise, the Mighty 20 MKII is just as versatile. Sporting an 8-inch NUX Custom Tuned speaker, this combo amp is suitable for any number of environments and playing situations. Lastly, it’s no secret that Sweetwater guitar players are total gear geeks, so if you’re like us and already have an impressive external pedalboard built out, there’s no need to worry; the Mighty 20 MKII has a built-in bypass option for just this situation. From high-quality amp modeling to thoughtful features, the Mighty 20 MKII from NUX sets the bar for what a modern combo amp can achieve.

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December 27, 2025

Awesome

By Sweetwater Customer

Has lots of effects

May 5, 2025

Worth being on your short list for home practice amps

By Gordon from Jenkintown, PA
Music Background: 50+ years playing guitar

The NUX Mighty 20 MKII is capable of sounding amazingly good considering its price and capabilities. Its well-built, its amp models are convincing, there are plenty of effects options, the free software is easy to use, and there are good old-fashioned knobs on top for direct control. It also has a Bluetooth input for wireless control and a USB output for direct digital recording (no A/D converter needed).

All that being said, keep in mind this amp functions based on software presets. This means that, with the exception of Master Volume, whatever settings you've saved in the Mighty Amp App (mobile phone) or Mighty Editor (PC desktop) will override the physical settings. Fortunately, you can still adjust the physical settings to taste once the amp is switched on. Push come to shove, you can get useable tones even without using the software. The Mighty 20 also takes pedals well. This is important because although the built-in EFX can technically replace pedals, they aren't as flexible. (See limitations below.)

LIMITATIONS: It takes 5 seconds for the amp to power up once you flip the on switch. Tone will be initially be determined by the presets rather than the physical settings. Although you can change between presets, there's no footswitch, so the only way to change settings as you're playing is either to push the preset buttons on the amp or use pedals. As for volume, although it's reasonably loud (think trumpet or sax), it would struggle to keep up in a band practice or stage setting with other instruments. If you keep in mind however that this is designed to be a home practice amp, and a reasonably priced one at that, and these limitations won't matter at all. FWIW, I'm keeping mine and selling one of my Boss Katanas. Give it a listen and you'll understand why.

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