Wayne Parham Messages: 18758 Registered: January 2001
Illuminati (33rd Degree)
For a while, the three π and four π crossovers were the same, except for the Zobel and the R1/R2/C1 values. But in 2008 and 2009, I started going through each of my designs with the WTPro system, doing further optimizations where possible. The polars were already pretty good, but after WTPro optimization, I'd say they're best of class.