You bring up a good question, why not more use of active crossovers? It solves so many issues and makes for truly superior performance. For anyone who is *truly* serious, active is the only choice, yet for some unknown reason most audiophiles are either unaware or just want plug & play convenience.
As far as selection, there's not enough demand, but what you need is out there. Several ready made ones, as you've mentioned, and also custom made are available.
As far as selection, there's not enough demand, but what you need is out there. Several ready made ones, as you've mentioned, and also custom made are available.