Sony XBR 55X900B

Sony XBR 55X900B

Excellent 55" 4K Smart TV.  Has large high quality built in speakers which give it much better sound than typical thin-mint tv's. .  Has HDMI 2.0 for one input. Originally $4000 retail. 

https://www.cnet.com/products/sony-xbr-55x900b/review/