Alright I will bit Auditor. Apparently you have/had a SVS sb-13. Says a bunch of words like "tight" but doesn't know his frequency response or room decay. Is your defenition of "tight" a measureable parameter or just magic? Is the frequency response of the seat important or just getting a sub that is the "tightest"? Let's get a little background reference established.
"I've been running my X-Ref 12 with an SB-13 as of late. Both subs are pretty tight, with X-Ref being a tad tighter. Obviously the SB-13 goes lower. Anyway, I gained matched both subs and get a decent sound for music. Its not perfect, I need to do more tweaking, but is pretty good. Its probably better to have two X-Ref 10's along with the SB-13, per Dr. Earl Geddes, instead of one X-Ref 12.
For movies, I typically run my system on different MCACC preset than I do for movies, with the subs being a tad hot, where critical listening is not required as much as it is for music.
I love both subs very much, with SB-13 being more of a dual purpose subs than the X-Ref 12."
"You should try tweaking it a little bit more, although I hear what you're saying. I experimented by turning off my X-Ref 12 and then turning off my SB-13, both sound good alone. They sound pretty good combined on music and since I listen to smooth jazz and they music does have very much ULF."
"You should look for a used X-Ref 12. It's a better sub than the Ultra 12 (more tweakble and user friendly). I'm sure it would match well with the Ultra 12.
I have an X-Ref 12, extremely tight and punchy, can't be beat for music. Its subjectively tighter than my SB-13. I love both subs, can't be beat for music (which I love) and no slouches for HT."
"You should have purchased two subs instead one big sub for better frequency response. That one big sub is not going to do it.
"In my setup the room is special, its designed to be a listening room and it has extensive LF damping. This is always going to be an advantage. But the approach is the same no mater what kind of room you have. The idea is to use multple subs located around the room to smooth the spatial and spectral response at the seating location. The fact that multiple subs does this has been proven time and time again and really isn't an arguable point. IF you want the smoothest bass, then you must use multiple sources, no single source can compete. The room dominates the LF situation in any audio system and its the sources that must be accomodated to the room." [Earl Geddes, Ph.D]"
Still running two subs? What internet direct subwoofer have you demoed? Which ones in the same place during the same listening session?
You also believe ULF frequency's are harmful as your evidence from the Nazi's proved, and that Plasmas are all a thing of the flat panel past just to name a couple.
I think the emo sub is alright but not the best value, but man I would never purchase something I had to read the same amazon subjective review 100's of times. I am glad you enjoy your purchase.