Exactly! I bought a pair of JL Audio e112's thinking they would be excellent subs. Unfortunately they had no way to adjust the FR to get it close enough in room for Audyssey to manage it.
The best value I have found in a sub was the PSA XS15se (I paid $625 or 650 each IIRC). However, the HSU ULS-15 seems to best value now that they have revised the ULS 15 and lowered the price and the XS15se has been discontinued and the current PSA has gone up in price).
Josh Ricci had the following comment about the PSA XS15se's frequency response:
That was a very accurate assessment, for me at least!
But understand that I am not saying the FR of the ported subs are bad. Most of the modern offerings discussed here have various adjustments including a sealed mode with the ports blocked, so I think he'll be able to tune them as needed.
I mentioned the ULS-15's because they were an original consideration and I believe (based on my experience with 4 sealed subs, they will be enough).
@Reckel , I think given the specific situation, it might be advisable to look at SVS subs. Hsu represents a better value, but I'm guessing the added cost of the SVS is not too outrageous. The reason to consider SVS is they will allow you a 45 day trial period and pay return shipping if they do not work for you.
What do you think,
@shadyJ ? What SVS subs would you say are closest to the ULS-15, Hsu VTF-2, and the VTF-3?