I have a set of cdt 6 and half with upstage located in my doors and a pillars. They have an rms of 400. I have a 4.100 and would like to use it for them. It would be 320x2. I think I can run it bridged stereo with y adapters on the rca. My question is how do I set it up so that both channels are doing the same thing. The panel is a bit confusing to me. If I have both channels on high pass, what abou all the other controls?

If you set both to high pass then try to adjust the high pass knobs as close to one another as possible, the same goes for the gain. Leave everything else alone