Hi veganboomer! Soundbars such as the HW-T650 are designed to replace external audio devices by receiving an audio signal from the TV or source, they do not feature an audio output or the ability to send audio to an additional device. Instead, you would bypass the soundbar and connect the headphones directly to the TV, or to the source device. The NU6900 does not feature connections designed for headphones, and does not have Bluetooth built in. You will need to purchase a Bluetooth transmitter compatible with the TV to take advantage of a wireless headphone solution. ^Tim