I had a chance to test and compare two models: Polk Audio SIGNA S2 vs Vizio V21-H8 and this review should help people who are looking for a good soundbar. The Polk Audio SIGNA S2 was rated 5, while the Vizio V21-H8 has a rating 5.5. Soundbars have the same set of buttons - power, volume down, volume up, source, Bluetooth.
Each of the models under consideration has active amplification type. By the number of channels, the devices do not differ. The built-in subwoofer is not implemented in any of these models. An external subwoofer connects to the SIGNA S2 via wireless, but V21-H8 has wired and wireless connection type. Audio features and specs of considered models we rated 6 out of 10 in our ranking. 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 V21-H8. As in the SIGNA S2, so in the V21-H8 there is the HDMI Audio Return Channel (ARC). The connectivity of each of the models was estimated at 6/10. The manufacturer of the V21-H8 provides a device control application. The Vizio V21-H8 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 V21-H8. Devices from this comparison cannot process surround sound due to lack of DTS:X. The SIGNA S2 was rated 4/10, while the V21-H8 received a mark of 5/10 for multichannel surround.