This paper is motivated by the foundational research gap in the area of stage monitoring. We create an experimental setup where a dummy head, vocal microphone, and stage monitor form a closed loop. Under these conditions, we isolate input and output sources, consider the system's frequency response and gain factors in the context of system feedback - a highly undesirable and dangerous occurrence in concert stage design and production. By isolating these variables, several metrics are generated and evaluated in order to determine theoretically ideal monitor placement. We anticipate that our report will contribute to the literature of audio engineering and also provide a theoretical basis for monitor engineers when making decisions on stage-monitor placement.