VIZIO SB2821-D6 vs Denon DHT-S217 comparison definitely makes sense. Based on our rating, both soundbars have the same overall rating of 4.8. The competitors' control buttons are different: power, input, Bluetooth, volume down, volume up and power, source, demo, volume down, volume up, respectively.
Both soundbars have active amplification type. Soundbars have the same number of channels on 2.1. Only the Denon DHT-S217 has a built-in subwoofer. The SB2821-D6 has a wireless connection to separate subwoofer, and the DHT-S217 - wired. The VIZIO SB2821-D6 got our rating of 6 out of 10, and the Denon DHT-S217 4 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support not implemented in both soundbars.
Both models do not have WI-FI support. Rivals from our review have Bluetooth support. Only the DHT-S217 supports HDMI Audio Return Channel (ARC). For connectivity, the SB2821-D6 received a rating of 4/10 versus 7/10, respectively.
App control is available for the DHT-S217. None of the models under consideration have a built-in microphone. Soundbars do not have Multi-room support.
Only the DHT-S217 has a Dolby Atmos multichannel audio format support. The soundbars do not support the surround sound technology DTS:X. For multichannel surround, each of the opponents received 5 points out of 10.