Funny how the maximum volume is 0, too. Whatever happened to 11?!
I think that out of the 6 receivers I've had, only the first one--an ancient Toshiba or something that I kinda miss--had positive numbers. Hadn't really thought of it before.
Update: I found a pic of my first receiver! (and I wish I could see the volume knob area better)
Weighed a TON. My uncle had the exact same one, which is part of why I got mine. I knew it was a good machine. He gave me a pair of his speakers to use with mine, too.