Reasons to avoid using (broadband) impulse response to align mains to subs.
An 8‑minute‑long video with reasons to avoid using (broadband) impulse response to align mains to subs.
For more information, please consider reading:
https://www.merlijnvanveen.nl/en/study-hall/166-subwoofer-alignment-the-foolproof-relative-absolute-method
and watch:
https://youtu.be/fpyv17rbgkw