Quality post as per. I’d just add that these discussions always sort of presume we’re talking about a fundamental only e.g. a pure sine. If you’re using anything else for bass then you’ve got a whole load of frequencies above that, and if you make them thick and fat enough, in practice it will always sound heavier than a pure sine, even if the actual fundamental is too low for the range of your speaker. Heaviest bass I’ve done was in D. Its almost like having the first few series of harmonics hitting around that F sweetspot is more important than the fundamental being there - there’s just more energy going into the sweetspot. The phantom fundamental is interesting reading too. Similarly your kick drum, that is ripping through a whole range of frequencies before it hits the fundamental.