I'm lost too. I don't understand how they have them wired... The voice coils are wired positive to positive and negative to negative. Then this random wire outside of the box goes from the positive to the negative on each sub.
Didn't get a change to take pictures. Needed to get the job done. They are dual 4 ohm. Now I didn't wire it like this just to clear it up. I just left it alone. I'm just trying to see why they got it like they do.
You gotta bridge this amp. I don't know how to bridge but it seems like it isn't bridge the way its setup.