Designers who freely share their research and projects on the web are a boon to mankind, or at least a boon to those with shared interests. John Krutke is such a person, with his Zaph|Audio site. John is a speaker designer with a good scientific habits: he theorizes about a possible new design, simulates it, builds it, carefully tests it, and compares the results with the original theory and simulations. Sadly, a lot of designers skip many of these steps. There are a dozen complete speaker designs on the site plus tests of drivers and other speaker-related projects.
John is much more towards the objective end of the subjective-objective spectrum than I am, and comes dangerously close to saying that “if I can’t measure it, you can’t hear it”, but his techniques seem good and he certainly clarifies speaker design. Check it out: Zaph|Audio.