It is possible for a Bluetooth speaker to support a passive subwoofer, but it depends on the specific model and design of the speaker. Some Bluetooth speakers have built-in subwoofers and do not support the use of a separate, passive subwoofer. Other Bluetooth speakers may have a line-out or subwoofer output that can be used to connect a passive subwoofer to the speaker.

To determine whether a particular Bluetooth speaker supports the use of a passive subwoofer, you will need to consult the manufacturer’s documentation or specifications for the speaker. This information should be readily available on the manufacturer’s website or in the manual that came with the speaker.