It was stated that the tops have inbuilt crossovers (3-way, although I didn't see the cabs having mid drivers.. as to what's "quasi" 3-way is another thing, I looked it up and it means "seemingly" but on the active crossover end it's 2-way, whereas with 3-way you'd have control over the low/mid/hi components).. running them via processor gives more control but risks damaging them; ie. adding more devices like filters, compression etc in the signal chain which is also considered reducing overall sound quality, as does bi-amping into the cabs (I highly advice not to but there could be people who do or have done so)
I highly doubt this is an official, exact figure but very likely so (edit : for example I wouldn't calculate overall power consumption based on it but it's a rough estimate of the power the part of the system sees).. the rig may end up sounding "thin" if improperly xovered though.That will cut their effective power handling by 75%
For instance, many active tops are designed to be run as full range on their own and processed (high-passed, DSP etc) with a sub.
I used to run my old passive rig with a mixer sub out (LPF) to a compressor/limiter and full range tops (15" tops&15" sub) which offered little to no control over the rig except for volume (and mixer EQ, it could've benefit from many things like GEQ, crossover etc but I kept it simple until I got an active system)
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