The "line out" and the "optical out" share the same socket.
With "line out" in use the B2's volume controls work on this.
With "optical out" in use the B2's volume controls have no effect on this.
With "directly connected speakers" in use/plugged in, the B2's volume controls work on these.
Thus given this :-
![a.JPG](https://groups.google.com/group/brennanb2/attach/1076b430506bc/a.JPG?part=0.1&view=1)
With jack sense set
to mute the wired speakers - you could only listen to the B2 optically.
With jack sense set not to mute the wired speakers - you would hear the B2 optical connection AND the wired speakers (if their volume was UP)
However, with jack sense set not to mute the wired speakers - you would hear the B2 optical connection but NOT the wired speakers (if their volume was DOWN)
Do you need more?
Fred