Best of my knowledge, length of run will determine wire gauge. The longer the distance the lower the gauge you want. This might help also (Speaker wire: How to choose the right gauge and type).Down to the last things I need to order for my upgrades. A Kabeldirect rca cables for the pre-amp to the Luna and speaker wire. I know I need banana plugs. Does the gauge matter?
I’ve typical always bought the lowest gauge I could afford.