Real-world bass roll-off
Agreed. Just to give you an impression of how the low-end actually behaves, here is a frequency plot of just that.
Originally Posted by Art K
As you can see and just as you would expect, bass gradually (and predictably) rolls off with lowering frequency and diaphragm size. That is intuitive. Were that not so, we'd all be perfectly satisfied with the bass generated by 1" PC speakers!
What's really as or more interesting is the amount of power (or subjective weight) that can be generated at low frequency. That is not shown by a curve like this. That is a much more complex matter and really needs a listening test. Even in-ear headphones can produce loud, deep bass when used in-ear as designed. But remove them from the ear and even with turned-up volume there is no bass because there is no power ability at all.
Specifications are so extremely difficult to interpret it's no wonder most audio magazines don't even attempt to present measurements.
Alan A. Shaw
Harbeth Audio UK