Right now i just have 2.2 system because i am in process of purchasing 7 new speakers
My front L/R are old Paradigms from 1988 and so they may be source of harshness.
Maybe with nice new speakers i can go to -10 or -5 but i really don't get level 0. Are you supposed to be 30 feet away from all speakers?
Dont get it.
I sit 8-9 feet from my speakers and listen at about -6dB usually. This is loud but doesn't 'sound loud'. The room is heavily treated which seems to \remove' a few dB. Your system shouldn't sound 'harsh' at -13dB on the MV - this would suggest you are running your amps into clipping or overdriving your speakers.