Wayne Parham Messages: 18757 Registered: January 2001
Illuminati (33rd Degree)
Grab a copy of the JBL Professional Sound System Design Manual. It illustrates this (on page 86 or "7-8") and a lot of other important issues including diffraction, phase, directivity and directional control, refelected and direct energies, room interactions, room mode calculations, treatments, etc. It's a really good non-technical general text for all those interested in building high efficiency loudspeakers and horns.