Thanks Lovinthehd. My bad use of terms
But the YPAO result is for a single speaker, there will not be any low frequency SW signal present, as shown above. This is why I am expecting the rolloff to move right as a response to me increasing the crossover frequency. Maybe it does but I am only see YOAO results after it calibrates the room, not just a simple remeasurement (hoping this is all that is needed). I guess this is why REW is used.
Time poor at the moment to tackle REW. I bought the Dayton Audio EMM6 mic, Behringer UMC202, mic cable, 6mm interconnects and 6mm TRS to RCA adaptors, to use with a Mac; all new to me so will take some effort to understand its practical use outside of a lab.
I really don’t think I have the ability to detect with my ear what is going on. This setup will be for movies mostly, not music so As long as the vocals are good and the bass management working, that would do me for a start. I don’t see home theatre as critical listening (audiophile style); maybe I am wrong.