Active crossovers are much better but have to be matched to the speakers very carefully. Also you need an amp for each driver if they are going to be fully active. The advantage with active is that each amp sees the speaker directly and not through a crossover network, ideally the amp has been designed to work with just that speaker load. This will only be true of speakers that are designed as active from the start. Having a pair of biwire posts does not bypass the crossover, just divides it into two sections. This is a very complex subject with an extensive literature. Audio Asylum will have what you need to read.
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