Dynaudio recommends using one Hub / Connect.
Yet, thanks to the channel Id setting of the Hub / Connect (A, B, C), up to three Hub / Connect can be used simultaneously. As all Hub / Connect use the same wireless frequency and Focus XD sends an uncompressed music signal with high data density, the risk of sound dropouts and functional restrictions increases, depending on the frequency utilization (by other routers and devices), while the range is reduced. Dynaudio does not recommend using multiple Connect in High Resolution Mode.
With multiple Hub / Connect, the individual units should be placed apart from each other if possible.