In terms of music, there's not much other than tubas and pipe organs that can play below 30 Hz, and even then, when do they? I guess that a better sub might be able to reproduce better, lower explosions with more rumble, but that would only help with movies (mostly action movies) and perhaps the 1812 Overture, wouldn't it?
I noticed a significant difference when i added my second EP600. I also do a decent amount of stereo listening. John told me about a couple of pipe organ CD's.. With the Dual 600's i can tell you, there is a significant amount of sound in the lower frequencies.... So, i think there is a common mis-conception that a good subwoofer "only, or mainly" benefits action movies... There are a lot of CD's that sound MUCH better in my opinion with a couple good sub's.
