NOTHING kills the fizz!, not pre EQ, not post EQ, Not global EQ, not Ownhammer IRs not Celestion IRs. It's fizz-city at its finest. No matter what I did in the ten days that I struggled with the thing, day and night, I couldn't make the amps sound better than a distortion pedal plugged straight into a desk board. I\m not a tube snob. I've played with plugins, modelers and tubes for more than 20 years but this is ridiculous. Apart from the Shiva, the friedman and the matchless simulation all the other amps are unusable. The tubescreamer and the klon are ok the rest of the distortion pedals are trash. Don't get me started with the three footswitches and the 6 blocks. The 6 blocks that turn into 4 if you use two amps and two IRs because the unit runs out of memory!
OUT OF M EMORY IN 2019!!!! WHEN YOU SAY 6 BLOCKS, YOU BETTER MEAN IT LINE6! It was an insta-gret for me and a refund obviously. Who ever tells you the unit sounds awesome but needs a little tweaking, is either deaf or a line6 rep.