Hi I came accross something in the Beotech website (http://www.beoworld.org/beotech/circuit.htm) showing how to use pin 4 in the powerlink to switch on a relay attached to a nonB&O subwoofer. I would like to do something similar until I can save up enough for some Beolab 9s, I have a BeoCenter2. Has anyone tried this, or got any thoughts about this