The effects of optimizing the speakers position in the room is CRUCIAL for extracting the best bass. This applies to ANY speaker in ANY room. This fact cannot be overstated!
That said, you do have a couple of 7308 tubes in the signal path that will soften the low-bass slam somewhat. I'm unfamiliar with your cabling, but that could also be a factor. Some cables are better than others at eliciting the most bass extension and slam.
If you got rid of the tube CD player and the tube preamp and went to good solid-state gear, you'd have greater bass extension and control. Using a nice tube or tube-hybrid amp on the midrange/treble modules, and a brute solid-state amp on the bass modules would be a way for you to get the most bass slam and still keep the sweet sound of tubes in the mid-top where it is most appreciated.
If you try all of the above and still can't get enough bass, there are some very good dedicated subwoofers that will pound you till your heart's content. But it won't all fall into place by itself -- you're going to have to go through some trial-and-error to get the exact balance you're looking for... Didn't anyone tell you that this quest for optimization was the fun part of audiophilia? Frank :)
That said, you do have a couple of 7308 tubes in the signal path that will soften the low-bass slam somewhat. I'm unfamiliar with your cabling, but that could also be a factor. Some cables are better than others at eliciting the most bass extension and slam.
If you got rid of the tube CD player and the tube preamp and went to good solid-state gear, you'd have greater bass extension and control. Using a nice tube or tube-hybrid amp on the midrange/treble modules, and a brute solid-state amp on the bass modules would be a way for you to get the most bass slam and still keep the sweet sound of tubes in the mid-top where it is most appreciated.
If you try all of the above and still can't get enough bass, there are some very good dedicated subwoofers that will pound you till your heart's content. But it won't all fall into place by itself -- you're going to have to go through some trial-and-error to get the exact balance you're looking for... Didn't anyone tell you that this quest for optimization was the fun part of audiophilia? Frank :)