Play source material that you know like the back of your hand.

For me, that's Jellyfish's Spilt Milk record.

I can tell within the first 5 minutes if the speakers are "right" or not with that one.

Aja by Steely Dan is another one that shows you what's what. smile

Maybe make a cd compilation of your favorites?

"Art is making something out of nothing and selling it."
---Frank Zappa