This is probably the dumbest thing that Sony could have done in making HDMI 3 and 4 the 2.1 ports. Now, you sacrifice the eArc capability if you want to have 4k/120hz. This means that you cannot use Dolby Atmos with any kind of receiver or soundbar, so your audio quality will suffer. Again, they should have made all 4 ports 2.1, I may be returning this TV to get the LG CX. Supposedly that has 4 HDMI 2.1 ports. Wow, Sony.