400w rms - 2 10's or 1 12

1 chamber should be fine. take into consideration if 1 sub ever goes, that you should not continue using that enclosure at all. or else you will end up with 2 dead subs. my preference would be 2 seperate enclosures, but you said it would be hard to match the chambers, so dont worry too much

hightek, consider checking out this thread, regarding two subs in the same chamber. From what I gather, its okay to do this as long as you're running the subs bridged from the same amp, because they'll receive generally the same signal and not put pressure on eachother. Running them from separate channels may damage them because one could fire when the other is not.  Also, having a divider adds bracing to the enclosure. Anyway, have a look and ultimately the decision is yours, especially given the impracticality of making two chambers like you said.When you step on the brakes your life is in your foot's hands

haha woops, linked the wrong one... if I could just find it...When you step on the brakes your life is in your foot's hands

here it is . i meant to address that to ocuriel, not hightek. some mornings....When you step on the brakes your life is in your foot's hands

Thanks chris_h. i would agree that it is ok running 2 similar subs in 1 chamber when running of the same channel. i do prefer seperate chambers, but like i said before, due to shape of quarter panel, will be hard to have both seperate chambers match. either way i have the whole winter to think about what to do. too cold to be messing around with fiberglass. thanks for everybody's help.