There's been a lot of discussion on the frequency ranges that
people can hear. There's one big problem with this and it's that most
cartridges e.g. Stanton 500 & 600's have a frequency range of 20Hz to
20kHz. This is probably due to too much electrical noise at the low
frequency end and limited by the mass of the stylus at the high frequency
end. noise at This means that when you're out bouncing all night the low
frequencies you think you're hearing are probably the vibrations of the
floor due to the power of the speakers. I'm sure you could get a bigger
frequency range from a CD-ROM player as it's possible to sample at up to
~45kHz.