I just got a jl 500/1 amp and i was going down the street listening to music at a realativly mild lvl and my sub just stops making any kind of noise i put a volt meter to the rcas that plug into the amp and i show signal but i dont show any out of the amp to where the sub hooks up......it my amp screwed or am i just missing something? ..............i have warrenty so not that big of a deal if it is messed up just wont bump for 4-6 weeks -(