ok i have a 2000 mazda protege w. a sony stereo, there's 2 speakers in the front doors & 2 on the back window sill, i'm putting in 2 new speakers in the back doors. i know how to install them but i dont know how to wire them. i really dont want to buy an amp if i dont have to. the speakers that are in the car are infinity, and im installing new infinity ones.
if you really didnt want to buy an amp you can splice the back ones and run wires to the new ones, im not sure how much power the new ones will get but its worth a try