This will depend greatly on the room, source, interconnects, cables. With that said in a 15 x 17.8 ft room I keep it a notch above the middle or about 60-70%. Keep in mind I am using a temp CD source at this moment.
BTW, did VSA come up with anything for you regarding a grill?
Best
BTW, did VSA come up with anything for you regarding a grill?
Best