I look at it that way putting speakers in a closet and expect good sound no it wont work .
Putting speakers in an open fiield doesnt work either.
There is an optimum with which can one gets the best results.
Depending on speaker membrane surface
For exact room dimensions you d better ask a good acoustician.
I always found a trapezium shaped room the best sounding.
Speakers against the short wall.
With active bass / adjustment you cant put tubes on the lowerregisters any more.
With the chronosonic i would reckon .
5 -6 meter wide 8 m long and at least 1 m ceiling clearance from the top of the speaker.
But im no expert
my sense is around 16' x 24' x 10' is where 'large room' allowing full scale starts. i say around because there are an infinite amount of variables involved. but if someone (with dynamic cone speakers) is 'clean sheet of paper' starting that is where i'd want to be minimally. that allows large speakers to breathe.
OTOH a more medium sized room can be easier to figure out. with size you do get extremes of issues since you are going to pushing the system's headroom more.