The Mighty 20 MKII is a 20 W combo that models amps and effects with a white-box algorithm aimed at an analog-style response. It has an 8-inch, 4-ohm custom-tuned speaker and seven presets. Each preset can be switched with scenes that keep delay and reverb trails running when changing sounds.

The effects section offers 13 dirt pedals, 5 delays, 5 reverbs, 2 EQs, 3 compressors, a noise gate and a filter. Blocks can be reordered. The internal amp models can be bypassed so the unit works as a power amp for external modelers and pedals. A 30-second phrase looper with an auto-tempo drum machine is also built in.

A USB-B port handles editing, USB audio streaming and firmware updates, so the amp doubles as an audio interface. The headphone output mutes the speaker. The included NBT-1 module plugs in over USB-C and adds Bluetooth MIDI control and audio streaming. Presets can be edited with the Mighty Editor on Windows and macOS or the Mighty Amp app on iOS and Android.