Why does the volume on my 1802 go from -64 to 18? In the good old days volume was meassured on a scale from 1 to 10, with 10 being the loudest. If you wanted something really loud maybe you had special equiptment that went to 11. What are the new numbers meant to represent? (Don't just say db, I read that in the manual.) I'm especially interested in what the 0 on this scale is meant to represent. Its pretty damn loud. Any form of explanation would be appreciated.