sometimes risk mo na din yung 2nd hand na amp apecially v-12 pa yan. i had this problem with the v-12 and kicker subs madali bumigay yung amp and nagkastatic agad kaya dinispose ko agad. try mo na lang kung maganda pa tunog but personally may trauma na ako in buying 2nd hand low end amps. kung kicker or rockford pa yan baka pwede pa