The VIZIO M512a-H6 vs Polk Audio Signa S3 comparison shows that these models have some important differences and common features. The VIZIO M512a-H6 was rated 5.6, while the Polk Audio Signa S3 has a rating 6.4. Soundbars have the same set of buttons - power, source, demo, volume down, volume up.
Each of the models under consideration has active amplification type. A noticeable difference is the number of channels that M512a-H6 has 5.1.2 and Signa S3 has 2.1. The built-in subwoofer is not implemented in any of these models. An external subwoofer can be connected to any of the units in this comparison. Rate 8 out of 10 received the VIZIO M512a-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 1/1 HDMI inputs/outputs in the VIZIO M512a-H6 versus 1/0 HDMIs in the Polk Audio Signa S3. As in the M512a-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 M512a-H6 at 8 out of 10, while the Signa S3 was rated 5/10.
The manufacturer of the Signa S3 provides a device control application. The Polk Audio Signa S3 equipped with a microphone. The models under consideration cannot become part of a multiroom system.
Dolby Atmos audio decoder is onboard the M512a-H6. The M512a-H6 can work with surround sound due to DTS:X support. The M512a-H6 was rated 8/10, while the Signa S3 received a mark of 4/10 for multichannel surround.