HIFI Passive Crossover
So-called passive crossover, which is a type of electronic filter circuitry used in a range of audio applications, to split up an audio signal into two or more frequency ranges, so that the signals can be sent to drivers or tweeters that are designed for different frequency ranges.
There are more passive crossover from 2 ways to 3 ways, and power range from 200W to 1200W, and so on.