Just a pic,
Selfmade 4 way passive network for 4530 with 2205, 2441, 2402, 2405 18 dB/O
optimized for flat response at listening place. Not final, only for test !!
Crossovers are 700, 7000, 11000 Hz. Try and error !! But works good.
Very hard to get a flat response of the 2405H (11000 Hz). Both drivers have different network components.