Really looking forward to installing 3 sets of wires (16/16/18 ga) through a Molex in my Grand Cherokee next month. I guess if it's just impossible to get it through, off with the doors and universal door boot here I come lol. There's some good suggestions in here. I don't think this topic gets enough attention though. How many super high end builds on really nice cars are using the factory wiring to get into the doors?
On my Jeep they seem tiny, like 22 ga tiny, and they gotta run 15-20' from the back corner where the OE amp is to the opposite side front door. I guess a really good online wire ga calculator comes into play. At what distance/gauge/wattage do you start limiting yourself using the stock wiring? Just random numbers here, but when is your $1000 amp feeding your $2000 three way setup being limited using factory wire?
There has to be some science behind this with resistance over distance causing voltage (thus power) loss on the speaker side. Anyone care to calculate?