The three-way 500L can be single-wired, bi-wired, or tri-wired. Three inputs are provided, allowing great flexibility in connection. When single-wired, two pairs of jumper plates at the bass enclosure bottom are installed, and four jumper wires connect terminals at the bass enclosure's top to the midrange/tweeter module. Internal wiring connects the bass enclosure's bottom terminals to the top terminals. This wiring can be bypassed by bi-wiring or tri-wiring.
A little confusing to me, lol. Interesting speakers tho. Ambitious design.