Jhwalker - I'm interested in what subwoofers you've tried and were unsuccessful with.
My guess is something like a Velodyne DD15 would solve your problem, and save you a lot of time and money. Comes with a mic to and hooks up to your tv to take a freq response of your room, then automatically uses parametric EQ to fix the bass problems with your room. I have one seamlessly integrated with my Dyn S1.4s. The sub is completely invisible - it sounds like all of this amazing bass is coming right from the dynaudios - but in reality, they are high-passed at 80hz.
My guess is something like a Velodyne DD15 would solve your problem, and save you a lot of time and money. Comes with a mic to and hooks up to your tv to take a freq response of your room, then automatically uses parametric EQ to fix the bass problems with your room. I have one seamlessly integrated with my Dyn S1.4s. The sub is completely invisible - it sounds like all of this amazing bass is coming right from the dynaudios - but in reality, they are high-passed at 80hz.