Taking it to your friends party, for example...

"Here, just plug this in..."
(Insert really loud music here)
"Sorry... I Forgot I had the volume cranked up..."

But presumably at a party you'd have the empeg's line-level outputs plugged into an amp with volume control, so you want the empeg to be at 0db in order to be the same volume as the other line-level sources in your friend's hifi system.

Peter