I've got a pair of EV's (Interface D) that are (active) biamp capable. There is a plug that needs to be switched with another plug on their bottoms. Then, you put an active crossover before them, cross around 500hz and you are actively biamping with a passive in (I presume) the midrange/tweeter section.
Klipsch also makes speakers that can be out of the box, actively biamped. Some of them are 2-way and would be biamped in a traditional way. Others are maybe 3-way and have a small passive between their midrange/tweeter but would be actively biamped between the woofer and the upper sections.
Nice thing about getting speakers from someone who's building them from the git-go to be biamped, you don't have to get into the game of figuring out what slopes to use, what PEQ's to use, delay....or anything like that. You can get the speakers, get the amps/active crossover and plug in the factory settings for the active and be done.
It doesn't have to be complicated.
Right now, I've taken my 2-way, actively biamped horn speakers apart... Pulling the top horn off and replaced it with a midrange by EV (VMR) and a tweeter by EV (St-350B).
Given that I'm also using subs, I now have a 4-way actively "quad-amped" system.
Although I know the recommended crossover points for the VMR & ST, I don't know the correct delay nor any PEQ's (if any are recommended)
Sounds 'good' but I'd imagine that it could be made to sound even better if someone with proper tools analyzed it and tweaked the crossover.
So you can get listenable sound by your ears....but.... I personally appreciate that my Klipsch speakers came provided with all the active information I needed to simply plug & play.