Soundbars offer a convenient way of getting powerful audio for home theaters. Rather than placing speakers around a room, they typically rely on audio tuning and technology to mimic the experience of a surround sound system. Polk’s Signa S4 soundbar features a sleek design, a wireless subwoofer, and a seven-speaker array that support Dolby Atmos. But, its best feature might be the sound modes. Be sure to check out the video to hear more on the $399 Polk Signa S4.