Xeo 4 / Xeo 6 (Hub) can be extended by an active subwoofer (Dynaudio Sub 250 II or Dynaudio Sub 600) with a Xeo Link. Please also refer to page 13 of the Xeo manual.

Xeo 3 / Xeo 5 (Xeo Transmitter) can not be extended by a subwoofer.