Wayne Parham Messages: 18835 Registered: January 2001
Illuminati (33rd Degree)
They do exist, but I have never been a fan of this approach because indoors, it provides the wrong pattern. I don't want sound radiated at the wall behind the speakers, as much as possible.
In my opinion, the perfect setup is the constant directivity cornerhorn, which radiates 90° from the apex of the corner. This is a natural section of the 360° pattern you asked about, limited by the walls adjacent to the speaker.