The cute little REL sealed subs will get to 12Hz, but not at any level that will be useful. The spectrum below 16Hz is generally only solved by high displacement sealed system and the occasional mammoth vented sub equal or larger to the Thor's Hammer, where only a very few vented designs will do anything to or below 10Hz in room. In even very large enclosed spaces, enough sealed subs can be designed to extend to the lower limit of the connected electronics. In typical systems that will range from 3-10Hz, with most enabling 5-8Hz response from an appropriate design. In most rooms you would be looking to have at least 4 of your DD18+ subs to really deliver the experiences you are reading about, with a pair starting to hint at it, and some systems out there more on par to what 8 of the DD18+ subs can produce.
That said, there's much more to great bass performance than flexing the drywall at 10Hz. When I demo subwoofers now I usually pick one loud and low track to finish while looking for more engaging scenes where the bass energy and detail pulls you into the movie or is more percussive and eye-popping rather than just loud. One of my go-to demo's is still the opening scene and then to the final aerial battle in How to Train Your Dragon. You can get some clear dialog, sweeping effects, explosions, huge dragon wings flapping, and of course the epic explosion/crash finale. This also has the benefit of not being too hard on the ears at very high levels vs. say the pipes bursting in the latter 1/2 of the super-intense, U-571 "Depth Charged" scene. Interstellar, while not quite as much ultra-deep as some, has a few super impressive scenes, so long as the listeners realize the dialog sounds vary from clear to distorted due to the director's intent to capture the different acoustic conditions and tension of the moments.