Cool test. I listened and preferred A b/c it was tighter. B had more low spread but I thought it was overwhelming for the clip and took away from the clarity...
Wait... isn't the 'summing' option on the TG2 for summing two mic inputs to one mic output? It's not meant to accept line level ... are you sending a line level signal to the preamp input of the TG2? That would explain the output level at 3 + the attenuator... you're probably over diving the hell out of the input transformer... unless I'm missing something.
