Please see Polaris for all other details.
If you're going to stand among giants, it's to your advantage to share as much of their DNA as possible. For Polaris, this meant starting with the tweeter and midrange from Alexandria.
The odyssey of inspiration and engineering which led to the creation of the Alexandria midrange driver is detailed here and here.
The tweeter also comes directly from the Alexandria Series 2. All tweeter diaphragms are acoustically semi-transparent. This means the tweeter back wave, reflecting off the enclosure baffle, will partially propagate through the diaphragm, adding an overlay of "grain" and distortion to the front waveform.
The use of proprietary materials, along with Wilson-developed mechanical confiurations have proved extremely effective in reducing this form of noise, which, though minute, is nonetheless both measurable and audible, robbing the high frequencies of the last degree of transparency and clarity.
The Polaris Tweeter is a one-Inch Inverted Dome design modified to Wilson specifications at the factory. The tweeter enclosure uses Wilson's latest proprietary "S" material for the interior baffle. Rear wave reflections are essentially eliminated, resulting in high frequencies that are extended, sweet, highly resolved, and grain free.
Polaris Tweeter The Alexandria/Polaris midrange was developed to Wilson's specifications in partnership with a new driver manufacturer. Because of its extraordinary acceleration and freedom from intertransient noise, the midrange is able to resolve the earliest reflections (20 to 80 milliseconds) generated by acoustic instruments in a particular performing environment which are crtical to imparting to those instruments their distinct sonic "signature" in that environment. This is, in large measure, why Alexandria, and now Polaris, are unparalleled in creating convincingly realistc portrayalsl of live music.