I thought connecting my Kemper to FOH was as simple as running the XLR main (left channel for mono) into a direct box, and then right into a mic channel on the board. I did this at home into my Bose L1 Model II via the T1 tonematch mixer, and it sounded really good. On a live gig this weekend, it sounded horrible and thin. Nothing i did on stage could dial in a good tone.
This particular venue had Mackie 1521 mains and Mackie 450v2 floor wedges. BTW - my direct box is a Radial Engineering JD6 passive rackmount.
What might I be doing wrong? I thought the Main outputs of the kemper were line level. Balanced XLR and unbalanced TRS.
Any help would be appreciated.