Greets!
Based on this response it's obvious that the total system Qt [sysQ] is quite high, i.e. designed for OB, whereas the Altecs clearly aren't, so if made ~aperiodic they wouldn't have any bass to speak of and if they were open back like the Bionor, even some of the horn loading would be rolled off: One Amigo Visits Utah To Hear 5 Reference Turntables-My Step Beyond - Page 9
Best way to acoustically protect the drivers is either to compression load them in a small sealed cab or tune the box real high and in either case XO to a separate sub system.
GM
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