I have the Series III 16R StudioLive Preamp/Mixer and a new Presonus HP60 headphone mixer. I can't figure out how to connect my studio monitors. Before the Presonus HP60, I connected my studio monitors to the Main Outputs. But, now the HP60 requires to go from the Main Outs of my mixer into the Input A stereo inputs. That left me with no way to go from the mixer to the studio powered monitors. I ended up using two Aux Outputs (1 for left speaker and the other for the right speaker), but this seems inefficient to me AND I could use those Aux for the signals to the HP60 for the instrument monitoring. Maybe I'm not doing it right.