I should start a thread on measuring phase and walk you through it.
Measuring spl at a given frequency can get you phase aligned, but you would be extremely luck to also be in time with the same cycle.
You need to measure using a difference tool or transfter function tool to time align,
Mojo’s breakdown is terrific btw for his setup routine. Not how I would do it, but pretty clever with your sub setup. I think speaker outputs to subs hancuffs your options a bit, but I get your strategy for sure. Pretty well thought out. Thumbs up!
