The Polk Audio Signa S4 is a 3.1.2-channel soundbar system with a wireless subwoofer, designed to deliver cinematic 3D audio with Dolby Atmos support. It features a seven-driver array with up-firing speakers for overhead effects and a dedicated center channel for clear dialogue. Key features include a low-profile design for easy TV placement, single-cable setup via HDMI eARC, and wireless streaming via Bluetooth.
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