The HDMI ports on your TV look identical but only one supports ARC

Let’s face it: TV speakers are not any good. You probably have had to turn your TV’s volume up to 40 or 50 to really be able to hear it in a larger room and, if you’ve mounted the TV, you might be blocking some of the sound from coming out the best that it can. TV speakers aren’t meant to be amazing, as most people aren’t going to buy a TV based on how good it sounds.