In all the setup videos, material on the net it's said when going to a front of the amp choose either "Combo" or "Stack" front in some sort of form.

However when I plug into my Marshall head front or even a Line 6 Spider front (Via a Clean Channel), only "Studio/Direct" Output  sounds good. All those "Combos -Stacks" sound like there half way there and just not sound good at all.

The Studio/Direct is the only output method that sounds good to whatever amp front I plug into. (and I am on the 1/4" OUT -AMP mode)

ANY ADVICE???