Frequently, I see "Digital Audio" being advertised as 20 Hz --- 20 kHz, roughly matching the frequencies audible to a young pair of ears. The sampling frequency imposes a upper limit of 22 kHz. Add in some gradual filters, and there's your 20 kHz. But where does the lower limit 20 Hz come from? I know that most speakers, save some moderately expensive subwoofers aren't capable of reaching this deep, but svs does have a 16 Hz tune available. And apparently some find it useful. So, what's the story here? If one had a subwoofer capable of playing a 1 Hz tone, could one record that to CD and play it on this thing? And could one feel it, given sufficient decibels?