I'm not a big Wilson Audio guy, but I was under the impression that their dealers were particularly well trained for installation. Did your dealer help with set up? If not, perhaps you could talk to them about improvements.
Also, though I realize they aren't inexpensive, the Sophia is only intended to go flat to the low 30s, and in a relatively modest sized room. They are, in affect, a one piece version of a Watt/Puppy, and those required a WOW in order to really move a lot of air. If you need lower/stronger base performance, I agree with most others here, that a sub may be in order... or maybe a change to a more "full range" speaker.
Also, though I realize they aren't inexpensive, the Sophia is only intended to go flat to the low 30s, and in a relatively modest sized room. They are, in affect, a one piece version of a Watt/Puppy, and those required a WOW in order to really move a lot of air. If you need lower/stronger base performance, I agree with most others here, that a sub may be in order... or maybe a change to a more "full range" speaker.