Well thats promising as I have 2 vented subs from psa, the xv15se.
Looked at the spec on KEF. for the ci4100ql, for best LF response, the spec says cabinet volume should be 0.71 cubic ft or more. Minimum required is 0.35 cubic ft. Not sure how to visualize 0.71 cubic ft (or 0.02 cubic meter)
What I know is that this is going in my basement. The unfinished wall right now has insulation. When finished, between the insulation and the drywall I would expect around between 4 inches. I can ask the drywall guy to leave another inch if that will help.
I feel it would be easier to convince him than to break my head against my better half for a week and not get anywhere. BTW she is not too happy about the subs as well but they are already home
so there isn't much she can do about that (yey!!!!).