Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
The model includes the volume between the cone and the throat, including the spacer. The horn was designed to be used indoors on a cornerhorn, and that's what it was modeled in eighth-space. If you intend to use the horn outdoors, you'll want to model in freespace. Outdoors use requires a much larger horn.