You only have to worry, if you use the PL-in AND one or more of the other connections.
Just PL to the BL2 and from there to the BL3's.
Using a PL-splitter might also be possible.
MM
Thanks. Not sure whether I fully understand. You are saying that things work with my BL2/3 combo as long as I have two devices conected (e.g., non-B&O device and a Essence), but once I connect a 3rd one, I am getting problem with the PL-Out trigger?
Have the BL issues (speakers always on or big hiss) described by 1990 earlier in this thread of this post been resolved?