i know for music the SB sounds better to me than the ported version. although technically, the porteds measure "cleaner" ... i guess it is subjective taste to prefer the "sealed sound", i'm sure someone can explain the "sealed distortion". another reason is that i feel that the extra low bass the porteds bring to music are a bit distracting (if you listen to each one after the other).
i would say for music, if the SB was a 100 ... the PB was an 80. for movies, if the PB/PC was a 100 ... the SB was a 50. but that's just me.
Thanks for the kind words everyone. Now if SVS would only restart that SB16-U project...
if they can't do the 16 ... a dual 13 sub would still be killer i'm sure.
SB13 Ultra/2
and a PB13 Ultra/2 would be an F U to the world.
though i'm not sure getting an amp with that much power is feasible. would still look deadly though aesthetically even with just 3db extra woof (using the same amp)