A warning to all about HUGE Subwoofers

I ask, because when I looked at this website - see below, (and this is pretty much in accordance with my understanding), that the frequency response of all acoustic instruments is much higher than the 10 Hz frequency response mentioned in the original post.
(Barring organs of course, which is not used too often in rap music, at least not the last time I heard it.) Even an electric bass guitar does not go much lower than 40 Hz.
And only the really big bass drums only go down to about 20 Hz, (and those are typically only used in large symphonies, not rap bands).

Musical Instruments Frequency Response

Again, I was just curious. The only thing I can figure out is that they are using synthesizers to produce the artificial drum sounds that reach as low as 10 Hz. In which case, what do they do in concert? (Not that I would ever go to a rap concert, but again, just curious.)

(FYI, I can see why one needs a subwoofer for Home Theater, as there are explosions and such which can be below 10 Hz, (and of course the thrill of being hit in the chest with a big bass wave is cool). And yes, I have one for my HT too.
But for most music, it seems going down below 20 Hz is overkill. (Heck, maybe anything below 30 Hz is overkill for most music.) And yes, I have speakers that are probably somewhat overkill in the bass range myself, (EgglestonWorks Andra II speakers), but they are not designed to go down to 10 Hz.)

Just thinking out loud.

The larger the subwoofer or bass system the less it will cause issues with peaks and nulls or as you would say vibration in room walls furnishings.

Great post Kurt. Your post and the attached chart corroborate my empirical findings when I hooked up my impedance buffer. I also agree that it is curious what is causing the low frequency SPL in Systembuilder's woofer. As you speculate, maybe its synthesizers???

The old "acoustic instruments only go down to" statements always show listeners' musical tastes and biases. Am I the only one who likes Aphex Twin, William Orbit, and other electronica artists? They are lucky to not be hindered by the limitations of acoustic instruments in their artistic endeavors. Anybody wanna challenge the artistry of electronica? I am listening to Rachel Podger playing Bach Violin Concertos and my subs aren't hurting a thing. I may switch to Four Tet in a little while and I'll be glad I have the subs so I can hear all they intended me to hear.

The military might be interested in your subwoofer.
They could use it as an Acoustic Weapon.

Frequency & effects:
7 Hz: Supposedly the most dangerous frequency corresponding with the median alpha-rhythm frequencies of the brain. It has also been alleged that this is the resonant frequency of the body’s organs therefore organ rupture and even death can occur at prolonged exposure.

Just some interesting information I found out there.
Careful in that listening room.