Tone controls

[peterpiper]

why do some designers decide to use 20Hz frequency for bass control when most if not all speakers cant even reproduce it , what is the point of boosting something that is not heard, most manufactuers use a useful 50 or 100 hz to give a sense of bass weight if you feel the need to adjust , noticed even cambridge audio use 20 Hz to their bass boost /cut , so its not just high end amps that might be used with equipment that might just reproduce 20Hz at a push, can we even hear 20Hz as sound? ? , and does music even contain 20Hz, why 20Hz seems piontless

 

[Thompsonuxb]

Maybe you can feel 20Hz which adds to the experience.

But..... What's the gripe?

 

[MajorFubar]

The peak may be at 20Hz, but the slope could be two octaves or more so you'll hear it all the way up to 100Hz+, a bit like this:

The idea is it gives a more natural-sounding lift than 100Hz.