George, there were 5 woofers in each cabinet, and they were spaced 1" apart. It doesn't show in this pic, but the throat opening was approx 5". I believe the croosover point was fixed at 90hz, but I honestly don't remember, as the crossover was designed by our engineer, Rick Wheeler, who also did the research into the horn design. No delays, no limiters, no processing other than the simple crossover.
My description of the system's performance can only be relayed in subjective terms, and it's difficult to compare apples to oranges (not to mention my hearing at age 27 as opposed to age 58), but technology was very different back then. When I use the term "tight" I am referring to the lack of colorization to the sound reproduction at high volume levels. As I described earlier, when the subs were being driven at full volume the woofers were barely moving, and there was absolutely no vibration in the cabinets.
The system was not designed for live music, and the original club was a disco. When the venue changed owners it was turned into a live rock venue, but the bands (with one exception) did not use the system, as the stage was built in front of two of the hanging speakers, and between the sub horns. The exception was my band, and we would run a feed into the subs only. "Jaw-dropping" was the term most often used in describing the kick drum, and the location of the stage was almost ideal, as the drums were located just outside the pattern of the sub horns.