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Join Date: Nov 2010
Location: I'm Jackie Treehorn
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Direct comparisons are a little tricky because there are several Hsu subs (such as the VTF-15H, as you can tell, very popular around here) that have no SVSound equivalent, in terms of price, and vice versa.
You can fairly compare the ULS-15 to the SB13-Ultra.
You can fairly compare the VTF3-MK4 to the PB12-NSD.
Every other comparison comes with caveats. SVSound's top-end ported subs are in a different class compared to Hsu's top-end ported subs. So you'll hear "beats it hands-down!" alongside "well it should for X dollars more!"
As I understand it, both manufacturers' subs produce very linear response (each octave is played at about the same loudness as every other octave). For maximum upper- and mid-bass impact, you may want to check out Epik's subwoofers, especially the Empire, which lots of experienced users regard very highly, especially for music.
If you were to ask me, I'd say that the "mid-bass punch" that people sometimes talk about is probably the result of a relatively non-uniform response; otherwise, why would the mid-bass be more prominent than the other frequencies?
Maybe some sealed-sub aficionados can chime in and correct me if I'm wrong about that.
Once again, I am sorry to take a sledgehammer to so small and fragile a nut. -- Richard Dawkins, The Greatest Show On Earth