On the Munich show, the LINKWITZ LX521.4MG were driven by a 4-way analog, active, cascaded precision crossover & eq.
Followed by 5 amplification channels per side: sub driver #1, sub driver #2, lo-mid, hi-mid, tweeters.
This 4-way XO&EQ together with the NCore amps reside next to the cabinets...