Im running a Kicker s12L7 in sealedbox with a Coustic 601SE Amp and a Pioneer DEH-p4350 head unit. The amp sort of hard to tune, cuz it has frequency, sensitivity and bass boost control. Ive played with it for hours, but am not satisfied. I also have to have the sensitivity input real high which i dont like. What frequency level is adequate cuz i just cant figure it out.