Cannata, you can educate me. I always assumed that the Q series and the first S 5 had aluminum compartments that isolated the midrange from the woofers in the cabinets, which is what you describe as a midrange enclosure. Is that right? The S3 had the first new polymer rounded midrange enclosure which improved the sound. However, I'm confused about all loudspeakers requiring a mid range enclosure. You must be specifically talking about cone speakers, but what about boxless speakers in which the drivers are mounted to an open baffle? There are not many such designs, but I have seen a few, and they do not appear to have dedicated enclosures for their midrange drivers. Could you explain this a bit?
Also, I used to have Eggleston Rosa speakers. They had transmission line loaded midranges. For this to work, I don't think those drivers were enclosed in the traditional sense, but I really don't know. Thanks.