We designed the B2 to be a stand-alone Bluetooth speaker. It can receive Bluetooth data, and it also has a mini-stereo input; because of this, it doesn't have any outputs to connect to our S8 Subwoofer. Since the B2 does have an analog input, you could connect your source to your Subwoofer's input. Then, connect it's output to the mini-stereo input of the B2. This will work as long as your subwoofer has both inputs and outputs. Please note that subwoofer integration will not work for Bluetooth audio streamed directly to the B2.