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Clever membrane based stuff can cut the size down fairly dramatically but yeah it’s still not ideal home stuff. From a music recording/mixing perspective I think these dsp things are interesting when applied to headphones to emulate spaces or different speakers but fairly useless for speakers without room treatment. Changing the amount of a frequency doesn’t change the room modes and the temporal and listening location issues they cause.
Dramatic_Hammer-
I have the same reservations about dsp but it's tough to get around the low frequency modes caused by the size of the room. Most of us are stuck with non acoustic parameters to work within, I feel fortunate just to get one listening position sorted.
For mixing near fields solve most of the problems for me, producing with instruments is a whole different battle.
Airhead
At the risk of repeating myself, you can model a room in REW. Changing the absorption properties for all surfaces. I was surprised that the 50hz hump is near impossible to loose without changing the dimensions of the room. Another interesting fact about 50hz is the size of a bass trap that would be required to attenuate it, it's massive. DSP or EQ seems to be the way to go with stuff under 100hz.
What can make a big difference in the upper ranges is the absorption of the rear wall and front wall.