Every once in a while I crank out one of my test records/cd's. And yes, more often not I make a tiny adjustment to my system -- either a slight toe-in or speaker-width adjustment or a minor twist of the dial on my sub-woofer. In any case, my Stereophile test CDs are just fine. Sure, they never come close to giving me the fidelity some of my favorite CDs and LPs, but they certainly do more than simply take up space in the CD rack. My favorite test CD? Probably the one I got with my now long-gone Denon CD player.