Why would you guys advise him to buy a speaker that rolls off at that high of a frequency to begin with? Now, for the full range of frequencies, he has to crossover the sub at higher than 90 hz, which localizes it.This speaker is down 6 db at 80 hz. $300 can get you a better speaker than that. If I were to get an NHT speaker, I wouldn't go lower than a Classic Two, which at least has some bass extension.
The Hsu subs will roll off at 90 hz if you rely on it's internal crossover, but they are flat to over 200 hz if it is switched off. If your system is setup correctly you wouldn't be using the sub's crossover anyway.
Also, before you shoot down the Hsu subs, note that the VTF2 and VTF3 will have much better low-frequency extension, greater output, and a flatter frequency response than the sealed subs. They are also much larger and heavier than the other sealed subs, but with the size increase you get much better deep bass performance, and they are the only ones that can actually do deep bass performance from the ones mentioned. They would easily be the best subs, especially for home theater, but if you have to ship them back and forth from Miami to Brazil, that might be too awkward given their size. A sub that can approximate the Hsu's output and deep bass but is easier to haul around would be the SVS PC12-NSD, which only weighs 60 lbs.
