@n_brio wrote: "M2 has a power rating on 1200w at 8 ohm and 4367 300w with the same drivers are the x-over so much weaker in the passive speaker?"
My guess is that the active crossover for the M2 includes protection circuitry which makes it safe to power them with 1200 watts. For instance the woofer is probably protected from damaging over-excursion caused by high-power signals below the port tuning frequency.
And my guess is that 300 watts for the 4367 is a conservative rating, quite possibly based on the excursion limits of the woofer rather than on the thermal power handling of any of its components, including the crossover components.