A:Answer Hi Yodude,
Thank you very much for your inquiry. For your first question, when using an optional Analog Extension Cable (3.5mm, 4-pole Mini jack to RCA yellow, red and white, not supplied) that can be purchase at most electronic retailers, no, the TV doesn't support composite/regular RCA connection (yellow, red, and white) a third-party adapter will be needed. As for your second question, no, when the TV is setup in "Basic mode" it does remove some functionality like installing apps, services and features that require signing into your Google Account, and Google Assistant on the TV and not on the connected external device. Just simply plug in your Roku device to the available HDMI input of the TV and you're good to go.
Regarding your third question, unfortunately, no. It doesn't support 1/8-Inch (3.5mm) headphone audio input. As an alternative, you may consider connecting a wireless headset to the TV via a Bluetooth connection. The Bluetooth function of our XR-42A90K will work with any Bluetooth headphones/headset that support Bluetooth A2DP (Advanced Audio Distribution Profile) profile for wireless music playback.
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.
I hope this helps you, and thanks again for your question!
Best regards,
Romeo
