Hi shadow - The QN900B features 90-Watt 6.2.4 Channel audio with Dolby Atmos and OTS+ (Object Tracking Sound+) which uses strategically placed speakers behind the screen, allowing you to hear the getaway car drive from one side to the other, the fighter jet fly overhead, and the rain falling around you. Should you choose to add a Samsung Soundbar to your TV, please know that our Q-Series Soundbars (such as the HW-Q990B) feature Q-Symphony which will synchronize with the speakers of the QN900B TV for an immersive 3D sound experience.
~ Samsung Specialist