Well a lot may depend on your ceiling height. Our basement ceilings are 9ft, however, if you look in my pictures above you can see I have my Qs8's attached to a bump down area that hides some venting and an I-beam that spans our basement. The bump down is 10", so I'm guessing the Qs8's are about 7-7.5ft off the floor.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85