I said there is a chance, which can apply under myth. If hes running shitty rca's. Call it a ghost effect if it has remedied peoples noise issue by moving their wires apart.

 

If you are really concerned about noise, run your rca's up your A pillar, under the headliner, back to the amplifier, done.

If these are coax speakers, I would either, do four runs of wire (or find something like Streetwires makes, an umbilical with all speaker wires/remote wire) and just tie into factory wiring in behind your head unit... its only 100 watts AC

No door jambs, no mystery cuts

 

my sub never gets interference. so the rcas and power wire are no big deal.

coax speakers?

 

A two way speaker, ie not a component set that will need 2 sets of wires ran from a passive crossover