Foam surrounds and ports will never give accurate response.
It only allows for a slower base [sic!!!] response to go lower in
a smaller box. To understand that after each note, the speaker
must get back to "0" as fast as possible. Foam surrounds need
a sealed box to do this. Good bass-reflex speakers count on a
rigid surround and tuned port to accomplish the same task.

Pardon my bluntness, but you don't know what the h*** you're talking about.

To over-simplify it, a properly designed sealed-box woofer is _less_ resonant
than a bass-reflex design, and the driver "returns to zero" more quickly.

"Good" and "bass reflex" is a contradiction in terms.