rrright. Three pages on your thread isn't us helping. Yes, you finally came to the conclusion it can't be done, but page 1 was you arguing mathematics.
Anyhow, glad you understand it can't be done with your application
Bro, relax, he's not talking to you. You are defensive
No, he is talking about Pioneer's shallow mount subwoofers. Great shallow mount subwoofers for the price. These would need to be run sealed, as they are not recommended for ported enclosures. Check them out here -->
Pioneer TS-SW301 (TSSW301) 12" Single 4 ohm Shallow-Mount Sub
Again, you are talking a different language to the OP. First telling him to use WinISD, now this. You are just cluttering his mind with such advance information, he is not going to be able to process it. Throwing out all of these technical terms is not helping. He said he has little to no knowledge of car audio. So telling him to look at the Vas, Qts, Xmax, FS, basket design, construction, motor design, weight, spider size, VC diameter, woven leads, underhung and overhung motors etc.... is way above his knowledge level. It's above most people's knowledge level.