That’s interesting question u saying ok first of all I had my speaker already before I sync my speaker to the tv... the sound of tv speaker sound great without it but u know u may need in the future to buy a separate speaker for me it sound great without good volume I’m very picky about these things ... try without it then u decided if u need one everyone is different try it .. the tv has Dolby vision and atmos if u decided to buy a speaker make sure is Dolby atmos also ... together the pictures quality and sound is amazing