I'm trying to understand this. The best sub-woofers can output down to below 20 Hz. However, it is my understanding that with very low frequencies, the wave length of the produced sound can exceed the dimensions of some typical rooms. So let's say for argument that a $2,000 sub outputs usable volume at 18 Hz. However, let's assume the wavelength of sound at 18 Hz is 30 feet. If the subwoofer is located in a 10 x 10 room: Can I even hear the sound since a full wavelength of 18Hz sound is never realized? If the answer is yes, I'd like to know why. Any acoustical engineer types hang out here? If the answer is no, then isn't it a waste of money to spend megabucks on a sub if the room is smaller then the wavelength of the lowest frequencies that the sub can produce?