Wayne Parham Messages: 18793 Registered: January 2001
Illuminati (33rd Degree)
The plots were actually done with a Delta 10. The Alpha 10 idea was an afterthought that turned into a design in the eight π loudspeaker. You're exactly right that output from the Alpha 10 as a direct radiator is useable below horn cutoff, whereas from the Delta 10 or JBL 2012, there is not much output down low.