need help wiring sub

I have a RF 451s which is 4ohms stable. I also have to audiobahn 12s that are dvc 4ohms. Right now I only have 1 and its wired like the bottom picutre


what will be the effects of having a 4ohm sub wired like a 2ohm sub? Or is that picture 4 ohms? I think its 4ohms but am I getting all the power out of my amp at 4ohms or is the amp 8ohms?

Ok, the sub is Impedance: dual 4 ohms. I have it wired like that bottom picture which is 2ohms, I think. Is that bad?

Do I need to wire it like this


If I wire it like that then I am getting 450rms, right?

I am getting confused so I will try to draw a picture
This is the sub

-- ++
ooooo
ooooooo
oooooo
-- ++

Do I run a wire from the top left - to the bottom right +. Then I run a wire from the amp to top right + and to the bottom left -. Then I bridge the amp.?

I have it wired like http://www.audiobahn.com/tech/wiring/Series_Series_dual_4_ohm.pdf top picture. My amp says 450rms at 4ohms. Am I getting half of 450 at 8ohms?


I know I probably sound dumb but i probably am.

I tried drawing a picture


also, does it matter if the wire is in the inside and outside holes? Like there are 2+ and 2- on one side. If I had a + on the inside wired to a - on the outside. Will that matter?