David Fox sent me a photo of the CS3 with dual binding posts. Indeed that speaker, #539, would have been built months into the product life-cycle, and I would have been the person who made the silk-screen and punch jig for that plate . . . Hmmm . . . Be that as it may, feedback developed from reviewers, retailers and end-users citing problems that we couldn't replicate in the lab, and all turned out to be various forms of cable interaction anomalies. The coherent source architecture shone a light on problems that are just not audible under other playback paradigms. At some point (?) we quit the bi-wire game to mixed reviews.
As unsound says, there is value to splitting the signal, especially the equalized signal. For full disclosure, I am bi-wiring (present tense) my ceiling-mount PowerPoint recording studio room monitors as an attempt to preserve the transient edge of the tweeter from the deleterious effects of current draw from the woofer. Mike Morrow is making a cable where all conductors are braided together while having separate signal paths for the tweeter and woofer feed, so the entire bundle (12' long) experiences the same EMF environment, resistance path, capacitive and inductive envelope, etc. while segregating the signal paths. In my imaginary life, I would bring in my audio engineer super sidekick to measure, document and publish the paper elucidating what is learned in an A-B-C scenario of various forms of wire in my controlled, measurable, recordable situation. But, alas, life is short and priorities sing their own songs. In that song, Mike and I agreed that this solution is worth a try. I'll report my experience.