NUX releases V2 firmware 2.0.0 for MG-300 MKII

April 14, 2026 · 1 sources

The update is listed on NUX's product page for the MG-300 MKII with the entry "NUX MG-300 MKII Firmware V2.0.0 macOS Version: 2.0.0 Update Date: 2026/04/14"¹. The page does not state a Windows version number or date separately, and it does not give a price for the firmware¹.

According to NUX, V2 adds four wah models (CLYDE, CRY BB, V847 and HORSE WAH), accessed by pressing and holding the PEDAL button to open the Wah block, which the maker describes as preset-wide¹. It also adds three amp models under NUX's DeepImage label: I Deluxe Rvb, described as an American clean tone; I Classic A30, described as British chime; and I Fireman, described as modern high-gain crunch¹. The Global EQ gains a one-click reset and a real-time dB readout¹.

The AMP block now supports up to 10 NAM profile slots with native NAM A2-Lite support and independent Gain, Bass, Mid, Treble and Master controls, NUX says¹. 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 NUX's TSAC-HD white-box amp modeling algorithm, with 36 built-in impulse responses (25 guitar cab, 8 bass cab, 3 acoustic) and 24 user-loadable IR slots¹. NUX lists the sampling frequency at 48kHz, the AD converter at 32bit, the frequency response at 20Hz-20000Hz +1dB, THD+N below 1%, dynamic range at 106dB, input and output at +8dBu, and power at DC 9V¹. It has three scenes per preset, a Patch Level block placeable anywhere in the routing, and a configurable footswitch setup¹.

The same page also lists a later "GEN2" firmware, version 3.0.0, dated 2026/07/10, and QuickTone editor software version 2.6.7.16 for macOS, dated 2026/07/24¹.