Originally Posted by Theriddler07sms
So its time to upgarde my system. I went from Ascend Acoustics Sierra speakers and a Rythmik F12 sub to Klipsch RP160s, 450c, 250s and a Rythmik FV15HP. I have a Denon x1300w now and eventually want to upgrade but its not needed right now.
Anyway, this summer I will be ordering a couple PSA 210t's and a 210c for my LCR and I had thought about going dual Rythmik FV15HP. Originally i had debated between the FV15HP and the Cap1400 and went with the Rythmik. It has been a Fantastic sub but I want more haha. My F12 wasnt enough for my room, FV15 has been great but I want better SPL and better FR. I was looking between the 2400ULF and the 4000ULF. Space isnt an issue because I am on the first floor of a duplex (buddy lives upstairs so no issues with sound since he's usually at my place watching movies anyway). Anywho, I know duals is always better than a single sub. However, if i go with JTR I will be starting with a single sub and upgrading for a second one down the road. My current room is roughly 2000sq open concept. This is a temporary place and eventually I will be buying a house and building a dedicated space for a theater which will never been any bigger than 3500sq. Will the 4000ULF be too big for this spot? I listen at roughly -15 to -10 reference most of the time with the sub tuned about 9db hot. Every so often i like to turn the sound near reference to see if the house will crumble but hasnt happened yet haha.
Like I said, whatever I decide, i will eventually get duals since duals are always better than singles when tuned right.
I wanted to see what some of the other advice would be before offering my own, but let me see if I can summarize what you are saying. You have had two different Rythmiks and aren't so far able to get quite what you want from either of them. What you say you want is more SPL--presumably low-frequency SPL, and not just mid-bass SPL; and you want better frequency response (FR).
As I'm sure you know, moving to a JTR subwoofer won't give you better frequency response. That is either dependent on better sub placement, or on having dual subs to help with random peaks and valleys in the FR where a single sub is interacting with room modes. So, assuming that you have already worked on good subwoofer placement, what you are really looking for there is dual subs.
The low-bass SPL you are looking for is definitely something that the JTR subs can provide. (If it were only
more mid-bass SPL you wanted, I might recommend V3611's.) In addition to more low-bass SPL, I suspect that there is something else that you lack a little bit with the two different Rythmik subs you have tried. That is tactile response. I believe that I can offer at least a partial explanation for why the big ported JTR subs have so much more low-bass TR than the ported Rythmik subs do. But, explanations aside, there is ample evidence that the ported Captivators produce much more low-bass TR than the ported Rythmiks.
You notice I keep emphasizing low-bass TR. That's because the low-bass thunder, rumble, explosion sensations are produced somewhat differently than the mid-bass chest punch sensations, from the thump of a bass drum or from a gunshot. Most of us can get plenty of the mid-bass tactile sensations from a lot of different subwoofers, and even from some speakers. But, the low-bass tactile sensations require more effort to obtain from our subwoofers. And, that's what I believe you are really looking for.
If I put all of that together: better FR, more SPL, and more low-bass TR, it leads me to the same conclusion that Jamie reached (in fewer words
). What I think that you should really do is to prioritize. Keep your existing speakers for the time being, and go all-in on a pair of Cap 2400's. You could certainly go straight to a single Cap 4000, but it wouldn't solve any issues you have with frequency response. In fact it might make them worse, because as Ray pointed out, it will be even less forgiving with respect to placement than the sub you have now. That's something that he recently confirmed for himself, in a room about the size of yours, even with two subwoofers. Placement flexibility matters with respect to FR.
So, I think that dual Cap 2400's would give you exactly what you are looking for: better frequency response than you have now, if you are willing to experiment with placement; much
more low-bass SPL; and much
more low-bass tactile response. And, I believe that you will still find the Cap 2400's very effective in the future, when you can move to a larger space. But, even there, placement flexibility may still turn-out to be very important.