is the wiring harness is connected from front to back from the radio or power source for the amp? i have a cd player with the built in equilizer, if i run a small aftermarket amp and all new aftermarket speakers, will this be the equivalent to the bose system? i don't have a problem ripping apart my car with the bose system in it, but if i can get the same result from doing it aftermarket, i will. thanks guys.