A:Answer The specification says Surround Sound supported (DTS-HD, Dolby Atmos), which means it's capable of surround sound when hooked up to an appropriate device to do so. The included speakers are 40 watts total.
On LG's website, it says the speaker system is 2.2, with 20 watts for the normal speakers and 20 watts for the woofer.
http://www.lg.com/us/tvs/lg-OLED55C7P-oled-4k-tv