[Manolo]

Has anyone studied this option for these loudspeakers? We know that the xover frequency is 600-700 hz, depending on the model, this as far as I could gather from reviews and specs.

It is certainly a second order xover. And we know that there are a few tricks in the passive xover such as notch filters or
Other phase related aspects. So, how would that be considered in the implementation of a xover using a dsp unit which has a lot of variables that can be used. Maybe it would be interesting to experiment with it.

[DannyBadorine]

Which speakers are you asking about?
Notch filters, EQ, Crossover types, etc. are all easily achieved with DSP.  It's much easier to get a flat frequency response with an active crossover, but it's up for debate whether it sounds better.

[Manolo]

M4 Triodes