NUX releases GEN2 firmware 3.0.0 for MG-300 MKII

July 10, 2026 · 1 sources

NUX released GEN2 firmware version 3.0.0 for the MG-300 MKII on July 10, 2026, according to the firmware listing on the maker's product page¹. The update follows version 2.0.0, dated April 14, 2026¹.

The firmware adds four wah models, named CLYDE, CRY BB, V847 and HORSE WAH; the wah block is reached by pressing and holding the PEDAL button and is preset-wide¹. It also adds three DeepImage amp models: I Deluxe Rvb, described as an American clean tone; I Classic A30, described as a British chime tone; and I Fireman, described as a modern high-gain crunch¹. The Global EQ gains one-click reset and a real-time dB readout for editing¹.

NAM support is expanded so the amp block holds up to 10 NAM profile slots, with native NAM A2-Lite support and independent Gain, Bass, Mid, Treble and Master controls¹. NUX notes that when NAM is enabled the IR block is disabled by default, since NAM already includes cabinet simulation¹.

The MG-300 MKII is a compact amp modeler and multi-effects unit built on the TSAC-HD white-box amp modeling algorithm, with 36 built-in IRs (25 guitar cab, 8 bass cab, 3 acoustic) and 24 user-loadable IR slots¹. NUX lists a 48kHz sampling frequency, 32-bit AD converter, 20Hz-20000Hz frequency response, THD+N under 1%, 106dB dynamic range, +8dBu input and output, and DC 9V power¹. The page gives no price for the unit or the firmware¹.