doctors who prescribe naltrexone
contrary to the numerous speculation that many people more or less reasonably spread about the subject, my experience indicates that there are no such a things as “preferable crossover frequencies". The chosen optimum crossover frequencies are explicitly the subject of the specific drivers and the way in which they were used. It is always possible to say what might be “preferable” as a crossover points for a specific family of drivers or a topology of the drivers but this it only because they would share some, more or less common, performance characteristics. However, even within that family of the drivers you might find some radical deviations that would violate the “rules”.
Trust me, those people, who stubbornly proposed that “upper mid range should be reproduced by a single driver”, “the tweeters should kick in at the middle mid range due to the issues with phase integration and group delays”, “upper bass should have a high order low-pass slope” and so on… those people are mostly clueless. They build theories and unnecessary logic based on thier accidentally found settings, and then by building “after-factum” those “rules”, they try to justify and rationalize thier own actions. (Not to mention the mostly thier systems sound like garbage…)
Anyhow, my answer would be: do not worry about the crossover points. Find better drivers; define this best operation parameters for them and THEN the crossover points will logically flow out of your research. In the best scenario you not only do not suppose to worry where your crossover point would be but also, you should not exactly know where they were. I am not kidding....
"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche