I will pass on those drivers, due to the reduced amp output.
So... got a link?
Not that I'm trying to talk you in to it or anything
but keep in mind the floor footprint of a dual stack of these in a sealed box isn't any bigger than a single; you're just going up another foot and a half; the whole thing ends up about a meter tall all done, so finished nicely still not very imposing, unless of course you need the short height to tuck them under something?
I've had this setup before (dual 12-8 x 2) and sure it can play loud, but it is the effortlessness with which it does the thing that is so amazing. I've also had dual single box sealed 12-4s; if I was building a music-only system and didn't need reference volume orchestra, the single driver subs will do the trick in a small to medium sized room. If I was doing a home theater and using these drivers, a quad sealed gets you trading punches easily with folks running dual 15"s with a lot less floor real estate taken up. I know I'm probably in a small minority of "audiophiles" that value this, but a system handling crescendos like it's barely moving (and the headroom and dynamic range that implies) is one of the benchmarks I've decided for me personally draws one of the lines between good and great systems.
I'm not sayin', but I'm just sayin'.