My room is decent till about 80 hz and then I struggle with bass. I was able to get flat measured response to 20 hz when I carted my dipole? Mirage sub with a 12” driver on opposite sides then all the duct work in my basement listening room started rattling behind the drywall. Gone. The solution for the bass null in my room was trying speakers with different alignment, side firing, rear ported, etc. My kef r107/2 had all the bass emit from an opening at the top of the bass bin right in front of the head unit and I really got great results from them, too bad they couldn’t continue updating that model as the design itself was imo more room friendly than any following reference from that company.
