There was three common mounting heights I Ran at repeatedly: ~ 10 10 ~ 12 foot at 1.2million 12- 15 feet, and those same highs but with 15 20 foot at 27 1 second.
There were three common mounting heights I ran across repeatedly: 10-12 feet(1), 12-15 feet, and those same heights but with 15-20 feet(2) being ideal.