Well I know practically nothing about audio. I installed 4 EX 365's, 2 in front doors and 2 in rear doors, and a Pioneer 3300 HU in a 99' Durango. Right now the Pioneer is powering the EX365's. I am really not looking to wake up the neighborhood with my stereo, just trying to get the clearest and best sound out of these Polk's. What I want to know is if an amp would make any difference in the Polk's sound quality or clarity. Especially at lower volumes?