The Polk Audio SIGNA S2 vs Vizio V51-H6 comparison shows that these models have some important differences and common features. The Polk Audio SIGNA S2 was rated 5, while the Vizio V51-H6 has a rating 6. Soundbars have the same set of buttons - power, volume down, volume up, source, Bluetooth.
Each of the models under consideration has active amplification type. A noticeable difference is the number of channels that SIGNA S2 has 2.1 and V51-H6 has 5.1. The built-in subwoofer is not implemented in any of these models. An external subwoofer connects to the SIGNA S2 via wireless, but V51-H6 has wired and wireless connection type. Rate 6 out of 10 received the Polk Audio SIGNA S2 for audio features and specs, but the Vizio V51-H6 received 7 out of 10. The units in this comparison do not support Spotify.
Both models do not have a wireless Wi-Fi interface. Soundbars from this comparison have Bluetooth support. There are 1/0 HDMI inputs/outputs in the Polk Audio SIGNA S2 versus 0/1 HDMIs in the Vizio V51-H6. As in the SIGNA S2, so in the V51-H6 there is the HDMI Audio Return Channel (ARC). The connectivity of each of the models was estimated at 6/10. The manufacturer of the V51-H6 provides a device control application. The Vizio V51-H6 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 SIGNA S2 or V51-H6. Devices from this comparison cannot process surround sound due to lack of DTS:X. The SIGNA S2 was rated 4/10, while the V51-H6 received a mark of 5/10 for multichannel surround.