The MG30CFX combines Marshall's famous solid-state tonal circuitry with modern digital FX. Choose from Reverb, Chorus, Phaser, Flanger, Delay (tap-tempo) and Octave (fixed).
There are four channels, Clean, Crunch, OD1 and OD2, which when in manual mode operate like any 'normal' amp. When in preset mode, whatever settings you dial-in can be stored, so that when you switch to that channel, those settings will be recalled.
The MG30CFX has a bigger sound than the MG15CFX with slightly lower frequency response, and is loaded with a 30 Watt, 10" Custom speaker.