Originally Posted by madhuski
Thanks guys -
I've got the 118 and have been happy with it. But, all the talk of lower tuned subs has got me thinking if I can get lower extension. I did ask Jeff, and he can make a sub tuned like the 118, but my understanding is that would just increase my output, not extension. I'd love one of the giant monsters (4000ulf, FV18, TV36ipal) but they're just too large and heavy for my liking and for my wife's taste (these are going into a living room). My options are either 1 sub around the size of a JTR 2400/118/1400 cabinet (the 2400ulf is probably too tall) are two smaller subs. (the spot where the second sub would go would be a challenge WAF wise to fit another 118). That's what got me focused on the ones I listed. I figured/assumed they would have enough output given my listening levels while getting more extension.
Re: the 3012 - duals would be out. Ditto the G25.
I think I have a little better understanding now, of what you are after. Given your objective for more low-frequency response, and the size constraints, I would recommend a single Cap 2400. As you know, it is only 30" tall. It would give you a lot
more low-frequency SPL and low-bass tactile response, than what you are getting now, and the LFA feature would help you to generate a low-bass house curve.
The problem with buying sealed subs to try to replicate the very low-frequency SPL and TR of something like the Cap 2400, is that it can take a lot of them. Below 20Hz, it can take up to three comparable sealed models, and below 15Hz, it can take about four. With two sufficiently powerful sealed subs, you can create your own low-bass house curve. But, the sealed subs won't do that on their own, except in a very
In order to create a low-bass house curve with two strong sealed subs, which would be comparable to what a Cap 2400 can produce naturally with the right LFA setting and subwoofer boost, you would need to have REW and a miniDSP. With those tools, you could probably produce sufficient deep bass SPL to satisfy you, at your moderate listening levels, although it is unlikely that they could produce as much low-bass TR as the Cap 2400 can, even so. Low-tuned ported subs just have too much inherent advantage there unless you are running the sealed subs very
loud at very low-frequencies.
Given your overall objectives and situation, I don't think you can do better than a Cap 2400, especially since you have already been happy with your Cap 118. If you were looking for a somewhat different sound signature, I might recommend a Rythmik FV18HP with the paper cone. It is 3" taller and a little heavier, but the Cap 2400 will still beat it for the lowest frequencies, and for low-bass TR.
Edit: There is a reason why I keep mentioning low bass TR (tactile response). Below about 30Hz, and especially below 20Hz, we feel low-frequencies as much as we hear them. And, it becomes increasingly difficult to separate sound from sensation as the frequencies drop. If you are really chasing low-frequencies, below the capabilities of your Cap 118, then low-bass TR is a very important component of that. And the Cap 2400 will excel there.