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Hi Lorenzo1776, Thank you for your question. Using the USB port to output audio is not supported. As an alternative to Bluetooth, you can use the optical port if the wireless headphones use a transmitter. For optimum performance, make sure that the software version of the TV is up-to-date. When using Blueooth, the sound may be affected by the connection status or radio wave environment. The following are the most common causes: -Placing a wireless LAN access point close to Bluetooth devices or the TV. -The Bluetooth devices and the TV are too far apart. -A microwave is in use. In such cases, make sure to place a wireless LAN access point far from Bluetooth devices or the TV, or place Bluetooth devices close to the TV. The MASTER Series BRAVIA XR A90K OLED TV is designed to fit perfectly in any sized room or office thanks to the 48-inch and first-ever 42-inch screen sizes. Whether you are gearing up for an intense gaming session or settling down to enjoy your favorite movie or show, rest assured the A90K will be sure to impress. -Ralph
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