1) Running speakers full range creates phase issues below the crossover point, Gedees advocates this but I disagree, you want all “subs” to be the same model.
2) Digital/Active crossovers are the way to go, especially if somewhat tech-savvy. The MiniDSP SHD is awesome and can also be used as your pre-amp (high enough quality to not degrade even state-of-the-art systems.
3) Crossover where the speakers roll-off, you take measurements; for instance, if doing 2nd order on the speaker, find the in-room -12dB point, and crossover at 2x whatever frequency that is. However, you don’t want the crossover to be >100Hz, as then you get localization issues.
2) Digital/Active crossovers are the way to go, especially if somewhat tech-savvy. The MiniDSP SHD is awesome and can also be used as your pre-amp (high enough quality to not degrade even state-of-the-art systems.
3) Crossover where the speakers roll-off, you take measurements; for instance, if doing 2nd order on the speaker, find the in-room -12dB point, and crossover at 2x whatever frequency that is. However, you don’t want the crossover to be >100Hz, as then you get localization issues.