Patent Review: Head-Related Transfer Function Equalization and Transducer Aiming of Stereo Dimensional Array (SDA) Loudspeakers

This patent, awarded to Polk Audio, describes a very specific loudspeaker design that claims to be able to achieve better stereo sound reproduction with “a realistic ambient field and a larger, and more stable acoustic image.” This obviously aims at achieving something that Polk Audio actually patented nearly 40 years ago, with its original Stereo Dimensional Array (SDA) loudspeaker, and for which the new updated patent now provides a new improved version. This article was originally published in Voice Coil, February 2019.

Polk Audio announced the launch of the Reserve Series, a high-performance, versatile loudspeaker line designed for music, movies and gaming. The Reserve Series combines Polk’s flagship components and advancements in cabinet design to deliver an superior listening experience at an extraordinary value. IMAX Enhanced, Hi-Res Audio Certified, and compatible with both Dolby Atmos and DTS:X, the Reserve Series includes nine models available in matte black, matte white and walnut woodgrain finish.

The Legend Series, the most advanced loudspeakers in Polk Audio’s history where undoubtedly one of the highlights at the 2019 Rocky Mountain Audio Fest (RMAF). The latest flagship speaker line from Polk Audio, the Legend Series represents the most sophisticated, and intensively engineered loudspeakers the company has ever introduced. The new Stereo Dimensional Array on the new L800 speakers was justifiably one of RMAF’s most popular demonstrations.