petew Messages: 63 Registered: June 2011 Location: Albuquerque, NM USA
Viscount
I built four 2π surrounds. I placed them on "piles of stuff" while I was contemplating mounting bracket design and had them about 4' off the floor. They sounded great at that height.
Once I got the brackets done with tweeters at about 6' above the floor the sound opened up and improved immensely. Being above ear level works great for surrounds since as you move closer to a speaker you get further off-axis, therefore the volume is attenuated somewhat.