An affordable soundbar is always a good option to consider, so LG GX vs Yamaha YAS-109 comparison definitely makes sense. Based on our rating, GX has a total rating of 6.5 out of 10 versus 6.8 for YAS-109. The competitors' control buttons are different: power, volume down, volume up, function and power, volume down, volume up, input, microphone, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the LG GX has 3.1 versus 2.0 for the Yamaha YAS-109. The output power is different and equal to 420 (overall) W for the GX versus 120 W for the YAS-109. Only the Yamaha YAS-109 has a built-in subwoofer. The GX has a wireless connection to separate subwoofer, and the YAS-109 - wired and wireless. The LG GX got our rating of 7 out of 10, and the Yamaha YAS-109 6 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support is available on the YAS-109.
Only the Yamaha YAS-109 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Each soundbar has 1/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, each of the soundbars received a rating of 8/10. App control is available in every soundbar. A built-in microphone is present only on the YAS-109. Soundbars do not have Multi-room support.
Only the GX has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the GX. For multichannel surround LG GX got a rating of 10, and Yamaha YAS-109 6 out of 10.