What do you hear?

This was serendipity, but while changing cds I happen to get my ear about an inch away from the tweeter. I heard a little something that let me know it was on. Then I put my ear to the woofer (almost touching was the only way to hear something) and I heard the same thing. Both speakers. Becomes a tad louder (but you still have to be on top of it) when I crank the volume way way up. Can't hear a thing from a foot away. Is there always something in the way sound coming from a "live" speaker? If I put my ear to my Passion I can hear a little transformer hum, as well. I always knew that and it is normal for the amp. Can't hear a damn thing unless I'm putting my tympanics almost touching. What do you guys hear? Some sound normal? thanks in advance, warren :)