Hey guys . I have a rockford punch p300-1 amp. Recently the amps yellow protect light is flashing . Now I've figured out it's not the groin it's not the power source not the rcas but the only thing triggering it is the speaker wires from the amp to the sub . The amp doesn't run any speakers just the 12 inch rockford amp . I tried putting a different amp and different sub all together into my car . And still the different amp and different sub still didn't produce any bass. I cannot figure it out . I replaced my line converter cause maybe that was it but still the same . Any ideas on what else it could be ?