I am upgrading the system in my Challenger. I have 2-10’s and an amp right now. I want to add new 6x9’s in the doors, 6.5’s in the back, and 3.5’s in the dash. Planning to run a 4 channel Kenwood or Alpine at 50 x 4 to power the 6x9’s and the 3.5’s and just run the 6.5’s off the factory head...