For those who keep saying something about I said I have a cab that goes down to 17hz. that is not true.
But they still haven't told me how I'm able to get a clear 17hz.
They have, a number of times that I have witnessed, but here you go -
"A sound is said to have a missing fundamental, suppressed fundamental, or phantom fundamental when its overtones suggest a fundamental frequency but the sound lacks a component at the fundamental frequency itself. However, the brain perceives the pitch of a tone not only by its fundamental frequency, but also by the ratio of the higher harmonics. Thus, we may perceive the same pitch (perhaps with a different timbre) even if the fundamental frequency is missing from a tone.
For example, when a note (that is not a pure tone) has a pitch of 100 Hz, it will consist of frequency components that are integer multiples of that value (e.g. 100, 200, 300, 400, 500.... Hz). However, smaller loudspeakers may not produce low frequencies, and so in our example, the 100 Hz component may be missing. Nevertheless, a pitch corresponding to the fundamental may still be heard."
"A low pitch (also known as the pitch of the missing fundamental or virtual pitch) can sometimes be heard when there is no apparent source or component of that frequency. This perception is due to the brain interpreting repetition patterns that are present.[1][2][3]
It was once thought that this effect was because the missing fundamental was replaced by distortions introduced by the physics of the ear. However, experiments subsequently showed that when a noise was added that would have masked these distortions had they been present, listeners still heard a pitch corresponding to the missing fundamental, as reported by J. C. R. Licklider in 1954.[4] It is now widely accepted that the brain processes the information present in the overtones to calculate the fundamental frequency. The precise way in which it does so is still a matter of debate, but the processing seems to be based on an autocorrelation involving the timing of neural impulses in the auditory nerve."
What you are experiencing is nothing new Jauqo...
"Timpani (kettle drums) are tuned by listening for the missing fundamental. Hit in the usual way (half to three-quarters the distance from the center to the rim), the fundamental note of a timpano is very weak in relation to its second through fifth harmonics.[10] A timpano tuned to 100 Hz will produce sound most strongly at 200, 300, 400 and 500 Hz.[11]
A violin's lowest air and body resonances generally fall between 250 Hz and 300 Hz. The fundamental frequency of the open G3 string is below 200 Hz in modern tunings as well as most historical tunings, so the lowest notes of a violin have an attenuated fundamental, although listeners seldom notice this.
Most common telephones cannot reproduce sounds lower than 300 Hz, but a male voice has a fundamental frequency approximately 150 Hz. Because of the missing fundamental effect, male voices still sound male over the telephone.[12"
Now that's all from Wikipedia, so it's about as dumbed down as you can get. If you still don't understand, just accept that it's not some mystical voodoo you, and you alone have stumbled across - it's science. I don't fully understand sub atomic physics, but that doesn't mean I totally ignore the work of those who do.
