That’s what I’m planning, sub horizontal under the screen. It must be somewhat ok, since Axiom gives you that option, but I always wondered if there was any negative effects (moving driver closer to the floor). I’ve tried it in this position and it sounded fine.

My next step in sub-room integration is to learn more about how Trever is doing it. Best I’ve done is set my 4 sub levels to match the main speakers. I need to learn more about phase, measurements and how they relate to practical adjustments … I.e. just get more applied experience … theory only goes so far.