I tried looking up what drivers and tuning the Seas Trym has but on Solen's site it seems to be a 34L enclosure with 8.5'' driver and some others its a bookshelf speaker with, what appears to be, a 7'' driver.
Solen's site goes on to claim 28Hz-25kHz. Which, if actual, would have been just dandy for me. Perhaps give us some more information about your set-up, room and music peference.
Personally I'm not a big fan of subs in a stereo system, although, admittedly, I've heard some that sounds really good.
Have you tried moving the speakers closer to the wall? That, together with a bit of absorbtion behind the speakers can bring out the bass while maintaining imaging quite well.
EDIT
Ok, just found it on Seas' website. Pictured is a bookshelf speaker with 34L volume and tuning of 34Hz.
Drum&Bass guy?
