Polk Audio Signa S4D Black 3.1.2 channels
Signa S4D is Dolby Atmos Certified to immerse you in 360 degrees of surround sound. From added ambience in music to special effects flying overhead, Signa S4D provides an incredibly realistic sound environment. Plus, standard audio played through the Signa S4D can be up-mixed to create a virtualized Atmos experience.
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