Yes, it is possible to connect the Audio-Technica AT-LP3XBTBK turntable to Bose SoundLink Flex speakers via Bluetooth, but there are a few limitations and considerations to take into account:

- The AT-LP3XBTBK supports Bluetooth connectivity and can connect to compatible Bluetooth speakers, including Bose SoundLink Flex.
- However, simultaneous connection of two Bose SoundLink Flex speakers to the deck in stereo or party mode is not directly supported by the deck itself. The player connects to only one Bluetooth speaker at a time.
- If you want to use two Bose SoundLink Flex speakers together, you'll need to set them up in party mode with each other, but this will need to be done via the Bose speakers themselves, not the turntable. First connect one Bose speaker to the turntable, then configure the Bose speakers to operate in party mode.