just got an sr18 and started messing around with it. when i plug both the left and right main outputs into my mixer only the left has a signal. Am I missing something? Manual seems to imply both should send a signal. can't see any setting I'm missing either. Oh, if you just plug in the right it gets a signal but not with the left plugged in too. seems odd that you'd have two outputs if only one will work at a time. Maybe its broken anyone got anything?? Thanks.