Since my first Hi-Fidelity stereo system I got for christmas in 72, my first album I purchased was Black Sabbaths' self titled album, was hooked, the sound that came out of those speakers blew me away.  Black Sabbath will always be the godfathers of heavy metal.  So many bands I have seen since my first concert, have always said, thank you Sabbath and Zepplin for bringing us a sound like no other.  For a air guitar player, it is the greatest!!!!::surprise