The LG US77TY sound bar is like having a front-row seat to all the action. Cinematic Dolby Atmos and DTS:X create a virtual surround sound effect without the need for extra speakers. It's super immersive thanks to an array of seven channels including a trio of up-firing speakers. You better hold onto your hat as this sound bar can pump out an impressive 400 W of power. Plus, AI Sound Pro is on hand to make sure everything sounds just right. It's like having your own personal audio technician fine-tuning everything in real time.Good to know- WOW Orchestra combines the sound bar with your LG TV's speakers to turn the immersion up to 11- HDMI 4K pass-through supports Dolby Vision and VRR and ALLM gaming tech, so no need for extra cables- Stream music, podcasts and all that jazz from your phone or tablet using Bluetooth- You can upgrade your system with the optional SPT-8 rear speaker kit (sold separately)