Hi Sammy - Both the TU690T and CU7000 feature 20-watt, 2-channel audio. When stepping up to the CU7000, you'll gain Object Tracking Sound Lite (OTS Lite) for immersive 3D sound with strategically placed dynamic speakers that move the sound around you. Should you choose to add a Samsung Soundbar to your TV, please know that our Q-Series Soundbars (such as the HW-Q600C) feature Q-Symphony which will synchronize with the speakers of the CU7000 TV for an enhanced surround experience.
~ Samsung Specialist