Just my 2 cents...I was told, years ago when I first began involving myself in car stereo, that a bad install can make a good woofer sound bad, and a good install can make a bad woofer sound pretty good. YET....people will buy a woofer by the specification numbers, and then proceed to instll them poorly. When the sound is less than what they expected, they proceed to call the manufacturer a liar with hyped claims about what the product was supposed to do, but didn't. So....the numbers might seem to satisfy you, and yet, it will STILL depend on how the install is done, anyway....right?
Sure, I might like to see the numbers, as well. However, if the numbers look good in a Honda, will there be the same difference in a Ford? I understand what Tuan is saying about different measurements for every vehicle.
I think that if you guys are that interested in findind out about this, buy one, and test it for yourself. I see guys who will lay out $1000 for a set of woofers without blinking. When they don't like them, they'll sell them for $500. Yet, squeal at spending $250 for a custom enclosure!!! Sorry, I don't see the problem.