My room is for music only, not HT. One Kef KC62 sub.
This thread has caused me to reflect. I can say that once the optimization process is complete, it has never occurred to me make an adjustment based on a single song. What @terry9 says makes sense, but still there’s been no itch to scratch—oddly. It’s rare for me to take the path of least resistance, but I’ll take it in this case.
When I do explore changes in X-O settings (Hi-passing the mains and Lo-passing the sub) and volume— from my seat using the Lyngdorf App, it is to see if I can optimize the SQ for all songs. Kinda like one would do playing with toe-in or seat position.
I’m wide open to the idea of adding a second KC62 but have other HEA fish to fry before doing so. I hope it is as good as so many say.