I have 2 audiobahn 12s (model AW1251T, 400 watt rms) and a JL audio 500/1 amp. I was wondering what is the best way to wire them up.

wire subs in parallel.

I have them wired up series/parallel dual 2....according to wiring diagrams..Sept i don't have pos on one to pos on other and neg on one to neg on other then wired to amp. I have them each to there own sub outs...is that still dual 2 ohms?

Those subs are dvc 4 ohm correct? Wiring the VCs in series and the subs in parallel gives the amp a 4 ohm load then. It actually doesn't really matter with your amp since it is 500 watts from 1.5(I believe) to 4 ohms.

I have them wired up series/parallel dual 2....according to wiring diagrams..Sept i don't have pos on one to pos on other and neg on one to neg on other then wired to amp. I have them each to there own sub outs...is that still dual 2 ohms?

Yes they are. Ok so then I have them wired up the best way?