1) Exponential

2) Wonderful

3) They were designed to deliver vocals (film dialog) to every corner of the auditorium. It is said that a tuned horn and crossover for 800 cycles instead of 500 smooths out the low mid transistion. I never had an 800 cycle horn to try it. Also, the multicell horns are preferred.

4) Guitar (recorded) sounded great.

5) Altec is famous for it's detail. I used to enjoy cranking Dead Can Dance on these.

I'll add that to my threat collection.
-- Harry Callahan (from "Dirty Harry")