Hey there! Where is the Qu-16 Forum? 
Is there a possibility to use a Stereo Mix for Delay-Speaker? Like a Matrix!? I think the problem is that you can’t send the LR to an Stereo-Mix? Would it be possible to send all Inputs as POST Fader to an Stereo-Mix? However… that wouldn’t be my favour… maybe for a new firmware release to set it up in the routing screen!?
GLD-80 / AR2412 / AR84 / Qu-16