The LG soundbar uses 420 watts of power. The 420 watts is enough for a fantastic experience and the exact right amount of power for a powerful sound. These watts are also enough to keep your home or office space cool because they help dissipate heat generated by this device, which makes it much more efficient. So if you're looking for a powerful sound that will give you the best listening experience possible, then you'll want to take a look at the LG soundbar.