I have only had this TV for 12 hours. The sound is good, but I wanted better. I have a Logitech Z313 audio system with great bass. It uses a 3.5 jack that I usually hook up to the headphone jack, but this TV does not have one, so I tried to use a RCA AV OUTPUT, but this TV only has a AV INPUT! It has a DIGITAL OPTICAL CABLE CONNECTION, that will work great with a sound bar. There is a little hole next to the HDMI cable that is for EXTERNAL AMPLIFIERS, so I put my 3.5mm jack in there and it works great. When this is connected you are unable to use the internal speakers. I have watched 3 4k videos with absolutely no problem at all. It streams videos very well. No buffering or nothing when using KODI!! This is a fantastic deal for 319.99. This is as good as any Black Friday deal you are going to find 4 months from now. I would recommend this TV to all my friends and family and anyone who ask. The quality of the picture and 4k movies are TOTALLY AWESOME!! BUY IT BEFORE THE PRICE GOES UP!!! As always, buy the 4 year warranty to be on the safe side!! The 52.00 is not a big loss if you don't use it, but if you need it, you will be very happy you have it!!