hotlegs
Inspired
Long story short answer - use the front input. Lots of users with wireless systems use the rear input. Noise floor is definitively much more. Easy test for everybody, use a Plexy, raise up the gain and take your headphone with headphone output from axe fx. Don't plug any guitar chord, leave the both inputs unplugged. Switch the front panel between front and rear input, rear input produces much more hiss.