I seem to have a problem with my subs. I have 2 12" rockford fosgates hooked up to a boss ph3000d monoblock amp. I'm using a stock head unit with a line out converter to hook up the rcas. Everything seems to work fine except that the subs are barely moving. I can get around this problem by turning up EVERYTHING on the amp to max including the remote bass control. For some reason I don't think this is supposed to be the way it's supposed to work, I've wired the subs to 4 ohm and 1 ohm to no avail. Any help would be appreciated.