Okay i have a question. how do i wire a sub in parallel and how do i wire a sub in series. and how does it effect it in ohms law. Like if i wire my 4 ohm parallel that puts it at 2 ohms. so thats what the amp output would be at 2ohms. So if i have 2 4ohm woofers and i wire them both parallel that would make it 1ohm correct?

You got it.

but parallel is plus-plus and minus-minus correct? and how does series get wired?

Series is one wire to one negative, one wire to the other positive, then wire the remaining positive and negative together.

ohhh okay gotcha. i see how it works now (:

Here is a very useful calculator, just select the speaker quantity and voice coil/impedance and hit the wiring option.

Of coures learning the theory behind it is prefered !

http://www.the12volt.com/caraudio/woofer_configurations.asp