The most surprising thing to me when I removed the horns from the cabinets - for reasons unrelated to the aforementioned - was the internal wiring. It was run of the mill 10 or 12 gauge speaker wire throughout!
I checked out the wiring situation in the H-IIIs. It's a name brand (can't remember it off my head) of stranded OFC. It appears to be high quality cable - as good as one's likely to find in any $2K speakers.