Some music is quite soft, and sometimes you may want to turn the volume up.

The volume knob goes from -80 db to +10 db. Is the range between -80 and -70 used?

It's fine with me that when the volume is on the max, in a loud passage, that the amp will clip since I don't have to play it that loud and, it allows me to turn the volume more loudly on a softer passage.