can subwoofers make things worse?

+1 @wolf_garcia Explains what I mentioned as sound stage expansion.

Rel T series don't move air and shake room, roll off bass in lowest registers. As others have mentioned neighbors can be a very real concern, I was the one calling police on a very careless neighbor! So, not wanting to bother my neighbors was a major concern when purchasing  these subs, I stood outside my house and not really much more boom than my Klipschorns without subs. Subs with lower reach and capable of much greater output will have much greater chance of bothering neighbors. My Genesis sub moves air and shakes room, makes it unusable in my situation.

I recently added two Rel T9x, Klipschorns, 13'W x30'Lx9'h room. didn't really add much bass. but expansion in sound staging far surpassed my expectations. I've spent much more on electronics in the past and never experienced this level of expansion, should have done this years ago!

T series Rel's don't reach lowest freq in bass, but I've never experienced this kind  of coherence, integration with other subs, and those with dsp. With other subs constantly fine tuning sub settings with different recordings and volume levels such that it drove me nuts, gave up on subs for years.

I suspect two smaller T series would be seamless integration with your setup, as others have mentioned a single sub more difficult.  Smaller T series won't overload your room with deep bass and should provide very nice expansion of sound stage.