Understand d'Appalito speaker designs

The d'appalito designs are unique in speaker topology and often popular amongst designers. Why do they exist, what do they accomplish, and how do they work? Have a question you'd like Paul to answer? Go to http://www.psaudio.com/ask-paul/ I am getting close to publishing my memoir! It's called 99% True and it is chock full of adventures, debauchery, struggles, heartwarming stories, triumphs and failures, great belly laughs, and a peek inside the high-end audio industry you've never known before. I plan a few surprises for early adopters, so go to https://www.paulmcgowan.com and add your name to the list of interested readers. There's an entire gallery of never before seen photos too.