Originally Posted by iwong28
I would imagine the level of performance of the PB4000 vs. the 15 inch Rythmik or PSA is probably about even? Any pair of those with the added shipping for the Rythmik and PSAs push over the high end of my budget (over $3,000). At that point, it opens the door of moving up to a single higher level sub like the jtr2400 (the really big ones like the FV25 or TV36 are out because shipping is about a grand). With the shipping costs, the dual route is more than a single jtr.
I know the general advice is to go with 2 smaller subs vs. 1 bigger sub. However, I've seen posts from different posters being happier going from dual lesser subs to a single better one, which makes this decision tougher. In my case, I have some limitations in that I pretty much can only place my sub(s) along the front wall, either inside or outside of the 2 mains (if outside, 1 would be in a corner and 1 would not). I am also not that interested in doing fine tweaking and would not likely get a umik and REW. In that case, would the advice be to still go with duals?
I never posted on this thread, but I just saw your question on the Rythmik thread and decided that I would post my response here. The Cap 2400 is a very fine subwoofer, with very strong ULF TR. For a movie first application, I especially consider it a good choice.
But, you said that your application would be 90/10, music to movies, so I would assume you may be valuing clarity a little more than maximizing the <20Hz output and TR. The fact that you are already considering the Rythmik FV18 lends weight to that assumption. Rythmik ported subs are know for their clarity, and that is often considered a real plus for music.
My only reservation about the FV18 is that you are already coming from dual VTF-2 MK5's. I ran the numbers, and the FV18 with the paper cone would give you an advantage at all frequencies. I particularly looked at mid-bass frequencies, and at 16Hz and below. But, I don't know if the single FV18 would give you quite as much of an output increase as you may be looking for in a 4800^3 room, with an opening to another space.
If you are willing to consider dual FV18's, I think they could be a very good choice. In my opinion, the dual paper cone FV18's would give you everything you might be looking for with respect to improved clarity, and therefore musicality, and with respect to significant output increases at all frequencies.
If, on the other hand, you would prefer to limit yourself to one really large sub, my personal recommendation would be a PSA TV3612. I know that you said that the shipping for that subwoofer would be exorbitant, but perhaps it might be slightly negotiable? That single subwoofer, with its pro-audio driver would have a great
deal of mid-bass SPL, which you will enjoy for music, as well as the clarity that I believe you are looking for. And, it will also extend quite deep with its ~14Hz port tune.
I think that, in this particular case, either of those options would serve you better than the Cap 2400, as good as it is. Incidentally, don't give up on the idea of experiencing good ULF if you ever want to enjoy it, just because you couldn't achieve much with the HSU's. I have a 6,000^3 room, on concrete, and I can get all the ULF SPL and TR I want. Others in even larger rooms can do the same. (I won't mention which ported subs I have, because that isn't really relevant.) The point is that any of the three options listed in this post will be able to deliver much more ULF than you have previously experienced.
I hope this helps!