Originally Posted by JohnDean
<15hz is what got me looking at the XS30. Should I also consider the F15Hp or will I be able to tell any difference at these frequencies opposed to one port blocked? I'm new to HT subs so regardless of what I choose I'm sure I'll be ecstatic. I just have it in my head that going as low as possible is more important to me that a sub with the highest output. I'm not sure there is really much content down there but if there is I've convinced myself I want to feel it.
I may be nitpicking at this point and if that's the case someone set me straight please.
It's the nitpickinck every little inch out of your system for what comes out of your wallet that's fun, at least for me. I want high performance and high value. Good call that you are going to be ecstatic, those are three very nice subs you are looking at. Definitely look at the F15HP as well. Their FR + output are a little different but I think an influential difference between them is size also. You realize we aren't talking about small subs here right?
Traditionally folks say sealed are more musical and ported is more home theatre. However the FV15HP is known to really close the musical gap; we think because of the servo design. There is a review earlier in this thread where the fella says he hears a difference between the F15HP and FV15HP but it is very minor and subtle.
A ported design will give you less rolloff and more output down to port tune, but is not very happy below that. A sealed design start to roll off sooner (AKA the XS30 started rolling off at 40HZ) but does so very gradually. That's why the FV15HP has a fairly decent advantage from 14ish Hz to 40Hz but above and below the XS30 creeps back on top. In the end it is personal preference, and in the very end you're gunna have a bad arse bass system. I do think under 20Hz matters but diminishing returns is pretty heavy down here below 20Hz too. I measured -3db at 10Hz in my room (room gain rox) with one Rythmik, still need to measure the duals (on a radio shack meter, man I need a real mic). How much under 14Hz content are you looking at playing?
Obviously I went with the Rythmik after much research and can tell you I'm very happy I did, so I lean that way, but I'm not gunna ding anyone going for the PSA. I can't believe what this $750 XS15 can do. No it doesn't dig as deep or as loud as my Rythmik, but wow, $750!! I do feel that Rythmik and PSA are a better value than HSU or SVS right now but they are still doing better than the big box brands. JTR, Seaton, and Funk are a little more money than this price point.
Hope this helps and good luck with your decision. Don't worry, there are no disappointment land mines in the options you are looking at.