Hi I was wondering if any one could help me. I have installed many subs in various cars but i now have a 2003 Mazda protege5 with the 6 disc cd head unit and the factory Sub woofer that fits with the spare tire. My question is if i were to put a system in the car using a (LOC) To tap in to my rear speakers to plug the RCA cables in then should i tap in to the factory harness for the sub woofer that's in the trunk to connect my blue signal wire or should i run to the wiring behind my head unit im loving my Mazda to death and i will never return to a different car ever again im just looking for a little extra oomf 
any help would be greatly appreciated THANKS A LOT -MATT
any help would be greatly appreciated THANKS A LOT -MATT
