Gip, the built-in speakers are 20 Watts and support Dolby Digital Plus. While a Soundbar is not necessary, we always recommend one to give you the most immersive experience. Check out some of our Soundbars here: https://www.bestbuy.com/site/searchpage.jsp?st=samsung+soundbars&_dyncharset=UTF-8&_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 ^Gina