If you google JBL 4350 you will see the full specs.
The lower end has two 15" driver that extend up to 250Hz.
The upper end is three way with its own passive crossover, starting from 250 to 1.1Hz a big beefy 12" cone driver does the honors, above that and up to 9kHz a 2" compression driver, and above 9kHz to 21kHz another ultra high compression driver.
I use two 200W power amps for the high and low ends along with an electronic crossover set at 250Hz.