Roku Devices (Streamers / TV) does not let Bluetooth pairing to third party BT speakers.
Pairing Bluetooth devices to Roku TV is only supported if you are using the Roku TV Wireless Speakers, or the Roku Smart Soundbar in combination with your TV. You cannot pair Bluetooth devices to your TV on its own—this functionality is not supported.
There are 3 options to pair third party BT speakers
- Connect headphone output to Flare Aux-In (Have not tested how this works)
Let us know if you can test it out.
- Connect a BT Transmitter such as Anker Soundsync A3341 Bluetooth 2-in-1 Transmitter and Receiver or any other BT Transmitter for that matter, to the TV’s 3.5mm Headphone Jack,
Connect your BT speaker such as SoundCore Flare via BT to the BT Transmitter.
Pro – Works flawlessly Everytime,
Cons – you need to spend $35~$40 bucks for BT Transmitter
No Audio on TV speakers while headphone jack is plugged in.
- Use Private Listening Mode on Roku (using the Smart phone Roku App or Compatible remote) like @TechnicallyWell suggested.
Note that Private Listening mode via Smartphone Roku App is the biggest Battery Drainer on your phone ( I Personally used this and telling from my experience on iPhone X, 8, Samsung S8/9/10) also heats up your phone. Once connected in Private Listening, pair your Smartphone to the speaker of your choice.
I still use this method for me and my wife, watching movies on Roku with Roku App on iPhone with Airpods using the “Share Audio” options of Airpods (None of Anker SoundCore Headsets support this, though the Flare series, Icon Series, Rave & Trance, and some other speaker range support the stereo pairing)
Pros – you may connect upto 4 Connections to Roku TV via Roku App on Smartphones.
Cons – Phone battery Drainer, phone heats up ( this happens on latest iOS & Android version with Latest Roku App available on app stores)
Hope this helps!!
EDIT - Included option for Aux-in