Performance
Build Quality
Value $5,998/pair
AT A GLANCE
Plus
Enveloping soundstage from SDA-Pro tech
Dynamic, full-range sound
Flush-mounted elevation module option
Minus
Somewhat bulky cabinet design
Requires SDA-Pro interconnect cable
THE VERDICT
SDA-Pro, the latest refinement of Polk Audio's proprietary tech, elevates the performance of its impressive flagship speaker.
Many years ago (the early 1980s, to be precise), Polk Audio produced the first speakers to feature a technology it had developed called SDA (Stereo Dimensional Array). The idea behind SDA was to eliminate a problem called interaural crosstalk that's a necessary artifact of typical two-channel speaker configurations. Basically put, when listening in stereo, your left/ right ears hear not just sound emanating from the respective left/right speakers, but sound coming from the other speaker well. According to Polk Audio, this has a constricting effect on the presentation, with the width, height, and depth of the stereo image coming across as a pale representation of what's actually contained on the recording.
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