The Vizio V51-H6 vs Polk Audio Signa S3 comparison shows that these models have some important differences and common features. The Vizio V51-H6 was rated 6, while the Polk Audio Signa S3 has a rating 6.4. The soundbars are equipped with a different number of buttons, power, volume down, volume up, source, Bluetooth for the V51-H6 and power, source, demo, volume down, volume up for the Signa S3.
Each of the models under consideration has active amplification type. A noticeable difference is the number of channels that V51-H6 has 5.1 and Signa S3 has 2.1. The built-in subwoofer is not implemented in any of these models. An external subwoofer connects to the V51-H6 via wired and wireless, but Signa S3 has wireless connection type. Rate 7 out of 10 received the Vizio V51-H6 for audio features and specs, but the Polk Audio Signa S3 received 4 out of 10.
The Signa S3 can play audio from Spotify.
Wireless Internet connection is realized only in the Signa S3. Soundbars from this comparison have Bluetooth support. There are 0/1 HDMI inputs/outputs in the Vizio V51-H6 versus 1/0 HDMIs in the Polk Audio Signa S3. As in the V51-H6, so in the Signa S3 there is the HDMI Audio Return Channel (ARC). Connecting devices via USB is possible in both models. We rated the connectivity of the V51-H6 at 6 out of 10, while the Signa S3 was rated 5/10. Each of the soundbars can be controlled using the application. The soundbars in this review are equipped with a microphone. The models under consideration cannot become part of a multiroom system.
Dolby Atmos audio decoder support is not implemented in either the V51-H6 or Signa S3. Devices from this comparison cannot process surround sound due to lack of DTS:X. The V51-H6 was rated 5/10, while the Signa S3 received a mark of 4/10 for multichannel surround.