@balooo2 Fritz discloses the crossover design because it is a well-known public domain property of AR, which has received various good and mixed reviews. These issues are known to DIYers, who either appreciate them or modify them to enhance the speakers' sound quality. However, it's unclear whether Fritz publishes any modifications or specific parameter settings on the parts. In essence, if Fritz retains the crossover design as proprietary information, even though it originates from the public domain, it is akin to what others do. This practice safeguards intellectual property, preventing DIYers from openly replicating or fabricating Fritz speakers. The intention is to protect proprietary knowledge, a common and understandable approach in the industry.
Regarding other speakers, I've expressed my trust in the reviewers' discerning ears and their almost perfect assessments of Fritz speakers. However, I do acknowledge the concerns raised by reviewers about the quantity and dynamics of the bass region in Fritz speakers. While I appreciate my Buchard S400 mk ii, I was genuinely surprised to learn that Fritz "easily beats Buchard or Dynaudio S40" in the high/mid regions. Personally, I have a preference for speakers with weighty and nimble bass. The inherent bass aspect of Fritz remains a reservation for me in making a purchase decision. It ultimately boils down to personal taste and, infortunately, there are no 'jack-of-all-trades' speakers as Dave rightly pointed out.
I hope your audition of the Fritz speakers goes well, and you find them to your liking. I understand the painstaking process of choosing the right speakers, so best of luck in making your decision.