Posted by Wayne Parham on August 14, 2001 at 19:59:21

In Reply to: Re: What about the thermionic line? posted by Super_BQ on August 14, 2001 at 11:54:25:

The three and four Pi are DI-matched bass-reflex speakers, and the six and seven Pi are cornerhorns. The crossovers in each are carefully designed to provide uniform directivity and constructive summing through the entire coverage angle for smooth response everywhere in the pattern.