Altec 603

[voice of the theater]

I know it's a lot different than a 604 ("multicell dia-cone", not duplex), but do these speakers use crossovers? I didn't see them in the photos and there's no mention of them in the description. From this link (below), I see there is a horn -- do they send bass into the horn (which would surprise me) or is there a crossover (or is the signal "split" some other way)?

http://www.lansingheritage.org/image...1949/page4.jpg