How is the box configured? Does it share air space? Or is it divided? If the subs share the same air space you are basically running isobaric. If you're running isobaric, you need half the airspace the woofers require...meaning your enclosure is twice as big as it needs to be....and one of the woofers needs to be wired out of phase. If your box isnt divided, I'd run both subs either normal or inverted...not one normal and the other inverted. If your box is divided, you're basically running two separate sealed boxes. If thats the case, leave them wired in phase.
