Free air resonance

Very complex question i am not competent to answer...

I did not need to study this question because i dont have a sub...

But the answer is there...

https://rmsacoustics.nl/papers/whitepaperbassreflex.pdf

@unreceivedogma , 1+ @mahgister  Subwoofer drivers have a long list of characteristics that defines the size and type of enclosure. Both of your drivers might be usable in sealed enclosures and ported enclosures or only in one or the other. Read this https://en.wikipedia.org/wiki/Thiele/Small_parameters.

Having said all this and just having finished the construction of a new set of subwoofers, you can pick a driver suited to small sealed enclosures with as low an Fs as possible and with a lot of power and digital signal processing make it do whatever you want. A large B X L product ( above 25 T.m) helps a lot. You can push a sealed enclosure lower than a ported one. The ported one will go lower before rolling off but then drops off like a cliff. The sealed sub will start rolling off earlier but will continue to have useful output down lower.  This is a very cursory explanation of a complicated design process. I hate math. 

Thanks mijostyn.

I never think about that because i never need a sub or i did not want to bother me with one...

 But bass frequencies are necessary...For sure... My headphone deep bass is enough for me now...

@unreceivedogma , 1+ @mahgister  Subwoofer drivers have a long list of characteristics that defines the size and type of enclosure. Both of your drivers might be usable in sealed enclosures and ported enclosures or only in one or the other. Read this https://en.wikipedia.org/wiki/Thiele/Small_parameters.