Get rid of the Klipsch. I owned a couple of their subs a few years ago and they were junk compared to anything you can get from HSU, SVS, PSA, Rythmik, etc. Maybe they've gotten better over the years, but I doubt it.
You could use your VTF-15H with whatever new sub you get. It has a volume control. Turn it down and you won't overpower the space. Or get two Rels. Or get four smaller subs.
You could use your VTF-15H with whatever new sub you get. It has a volume control. Turn it down and you won't overpower the space. Or get two Rels. Or get four smaller subs.