So I have an older Aluminum coned Rockford Fosgate T1 that I bought off of this website from a highly rated seller. I'm going to wire it in and running + to + and - to - for a final ohm load of 2 (it's a dual 4) issue is, it only works when I wire one coil and one either positive or negative, when I connect both it stops. Both coils are good, as I've tried each by itself and they work. This same configuration works on my Memphis C3, just not the Rockford, why would it be doing this? Solutions?