Low frequencies are part of natural ambience that's everywhere, and subs bring that stuff to the room...not simply the low notes, although clearly that's a good thing, but the sense of reality that's part of live sound. I use 2 RELs with a small tube amp driving efficient speakers, and it sounds like real music.
Are subs worth the price for music?
My current speakers are Vandersteen 3A's. I consider them to have a good, solid low end. Specs say 26hz, -3db, if I remember. That's lower than most any music. I'm considering adding a vandy sub, possibly two to the system. My question is, for strictly music, are subs even worth while...$$$......if so, why? What could I expect that's different and/or better than what I'm already hearing..............No experience with subs and music, so forgive the lame question for those of you who already use them.