So, I'm going to run a dedicated circuit to my media rack. Will be a single, uninterrupted, run of about 75' of copper nm romex. Will 12 gauge be adequate, or should I go for 10? Voltage drop for that length is 4.9% for 12 gauge, but only 3.1% for 10 gauge. The 12 gauge will be easier to work with, and cost is a bit under half that of the 10, $47 vs. $110. But can the 10 gauge provide provide improved dynamics?