Carbon Woofer for a High Fidelity Sound. LG Sound Bar SN4A was engineered to produce clear sound with no distortion.Especially, carbon diaphragm in speaker woofer unit assures excellent sound clarity. Music, movies and even the news all have different audio profiles. LG Sound Bar SN4A featuring Adaptive Sound Control identifies what's being played and automatically adjusts the sound mode to create the ideal audio experience. Feel the beat with the powerful LG Sound Bar SN4A wireless subwoofer - convenient and easy to install, it pumps out 200 watts. LG Sound Bar SN4A has various inputs and convenient options such as Optical and Bluetooth®. LG Sound Bar SN4A be simply connected to your LG TV via Bluetooth® and optical. Enjoy more plentiful TV sound with a simple connection. Transform any movie, TV show or playlist into an immersive, multidimensional audio experience. DTS Virtual:X envelops the listener with Virtual Height and Virtual Surround channels, plus enhanced bass and crystal-clear dialogue.