I know I aint doing 5hz, thanks to mr. Crown K2............But, I can tell you than between 11-18hz, I'm doing just fine, and as Thomas said, that's were the real fun in subsonic content is!
I always get asked "why do you even bother below 20hz", etc, and besides the usual answers of plenty of content subsonically, tactile experience, and all, its always good to see how the HPSF
Do you know where the 20 Hz limit comes from? The Human Perception Smear Factor or HPSF. The fastest a human being can keep up with or register an event is 1/20th of a second.
Sound waves are oscillating back and forth. A 12 Hz note is pulsing 12 times a second. This is still slow enough for a human brain to perceive each individual pulse of the waveform. Once the waves are faster than 1/20th of a second, you can't keep up with them and your brain smears them. The result? Sound. Crazy eh? You only hear sound because you aren't fast enough to keep up with the speed of the waves. The same thing is true for film. Once you see 20 frames a second, you can no longer keep up with each frame and they blur together. You no longer see individual pictures. You see smooth motion.So check THIS out.
Take your subwoofer and sweep it from 10 Hz to 30 Hz. The moment when your eyes can no longer see the driver moving back and forth is the
same time your ears begin to hear a note !!!!! Give it a try....it was badass the first time I tried it!