Put a high-pass (low-cut) filter on a bass guitar, then see how high the cut-off frequency can be before you notice a difference.
This video uses a real Fender Precision bass as the audio source, and a 24 dB/octave high-pass filter.
With small speakers, you might not hear bass below 100 Hz.
Try it for yourself - find out how much bass your monitors or headphones are giving you.
