Hello,
Yes, plugging in your soundbar via HDMI does give you a more stable connection. For the best experience please check out HDMI at Best Buy. https://www.bestbuy.com/site/searchpage.jsp?st=HDMI&_dyncharset=UTF8&_dynSessConf=&id=pcat17071&type=page&sc=Global&cp=1&nrp=&sp=&qp=&list=n&af=true&iht=y&usc=All+Categories&ks=960&keys=keys
^Cristian