ARC Genesis made a huge difference for me when it came to subwoofer performance. Experimenting with location also helped, but it was great to just let room correction do its things. It helped address a big dropout in my room and gave me flat response to around 20hz before tapering off. Can’t complain!
With due respect, if (
only if) you trust your ears/brain, and have not actually taken measurements to see what's going on, then fine, because only you know what you heard or what you perceived, but that would be subjective so not reliable if comparison listening are done sighted and/or not tightly controlled; and therefore likely wouldn't apply to others who may be less subjective. Just flat for the subs might be easier than flat when integrated with other deep bass capable speakers. If, again only if, only the subs are measured, I would think yes ARC G can do a decent job on flattening the response, though it wouldn't do much to the dips as good as Audyssey or Dirac Live that also won't likely flatten such room modes, but they could still make significant improvements.
I have taken tons of measurements and so I know for a fact, it does not make a "huge difference" if that means huge improvements. Yes it could/would make improvements if one does one's calibration and follow instructions to the letter, but the results won't be as good as Audyssey and Dirac Live. If anyone finds that's not the case, I would love to see measurements that support their findings, but not just what they said/claimed.
