Hi guys-I've had the Focal Easyas for about three years, and they are fairly decent. In my opinion, they are missing a subwoofer. I am certainly a beginner when it comes to speakers. I've been told that there is no way to add a subwoofer to this wireless system. Is this true? For reference, the hub has the following: digital 1, analog 1, digital 2, analog 2 L and R. Thanks in advance.