I have 2 beolab 6000 speakers connected to a connection hub and then to my Samsung television.

I wanted to add a subwoofer to get an improved home cinema feel.  Unfortunately at this stage I cannot afford a b&o subwoofer, I have found a bower and Wilkins PV1D secondhand sub. 

Presently my speaker are connected to each other and then one cable out to the rj45 on the connection hub.

how should I connect the sub woofer please. What cables do I need.

nik