Regarding several posts that have drawn a distinction between recordings of acoustic instruments (can be played flat) and loud, distorted rock and roll (needs eq help), I disagree with that generality. Sure, on some systems that may be the result. I tend to listen to less heavily distorted music than cleaner, more acoustic oriented stuff, but I do still listen to plenty of rock. When I put on London Calling by The Clash, or the first Pretenders album, I'm blown away by the sonics. No need for eq. There's a live Delaney and Bonnie LP (On Tour?)... not a great recording, but when I play it loud it sounds just like I'm sitting a third of the way back in some big hockey rink listening to a loud, period-correct rock concert PA. It makes me feel like I'm there.