Are you talking home theatre or music?
The lowest bass under 30hz is great for home theater. Room shaking explosions and crashes. However, for music, the focus is a bit higher above 30hz in the 40 to 80 range. If you want the tactile feel of a kick drum the range could be even higher. To hear the 'skin' of a kick drum gains can be had all the way up in the 200hz range.
Music has very little 20hz information. Only the lowest registers. This deep, barely audible level has little to do with tight punchy bass.
On the other hand... 40 or 50 or 60 hz can punch you in the chest with music. Very tactile. So don't fall into the trap thinking lowest frequencies are the only way to get tactile bass. Unless your goal is to feel the deep rumble of an earthquake.