I'm currently using my SL16R III on a theatre show and I have several pairs of FOH speakers to address individually - as well as subwoofers - because of the shape of the room.
I have setup two stereo paired and one mono matrix mix with only the Main Out included in those mixes.
The mono matrix output has the high shelf filtering down to 140Hz to help the subs because they don't seem to have a reasonable cross-over of their own.
The issue I'm having is that every time I cycle the power on the 16R I find that no sound is going to the Sub matrix mix (Mix7). When I set the send point from Post to Pre and then back to Post again the sound comes back but only until the power is cycled again.
I can't see that I'm doing anything that should be causing this issue and the other two stereo matix mixes don't behave like this. Any ideas would be welcome.