D'Appolito on What Matters

John Dunlavy:
http://www.stereophile.com/interviews/163/index.html#L4C6Gveos1Z7KVMl.97

I'm not sure all of the above named authors would exactly hail the line source.

Now that was funny!

The last time I spoke with him, he was very excited about going to an all digital self powered multi-amped model. He was holding out for better chips. He said the amount of labor time would drop dramatically,  and though the initial project would be expensive, he thought that the cost of succeeding models would drop at a considerably fast rate. Regretfully, he didn't live long enough to see it to completion.

^Can't comment on the D'Appolito's, but Dunlavy used a similar       W M T M W  driver configuration (with different cross-overs of course). 
It has been claimed that he had all parts tested, logged and matched accordingly, and then the cross-overs for each speaker was individually tweaked to match a reference.
http://www.stereophile.com/content/dunlavy-audio-labs-signature-sc-vi-loudspeaker-specifications#Gkx...

Rumor had it that many suppliers were irked that he sent so many things back.