I got a question with my amp what is the best settings to have it at with the crossover and what does the numbers mean. I also wanan know why some notes that hit make kind of a popping sound but when a deeper note hits it sounds amazing so whats the best settings to have the amp at. I got a Kicker zx1000.1 amp powering 1 Kicker L7 which i know i am over powering the sub but it still sounds great. So any help