But that's what I and saying since when
where is 60Hz and where is 45Hz ? I cannot find it in the diagram ? Can someone help me locate it ?
The frequency, in Hz, is listed across the bottom of the chart. It starts at 20Hz on the far left, and goes up to 20kHz on the far right. Each new vertical line, on the left, represents a jump of 10Hz. So, 20Hz, 30Hz, 40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, and 100Hz are the first 8 vertical lines. So, where you see the data dropping down is at 45Hz for JBL and about 60Hz for the Apple product. The slope of frequency response is not linear, but logarithmic, so after 100Hz, things start going up quickly. New intervals are labeled across the bottom.
As it is, you can't possibly judge two different speaker designs based solely on the speaker size used, or the quantity used, but that will give you a very rough idea. Be aware that the standard in-wall speaker I use in my home have a 3-way 8" design, so the woofer is MUCH larger than what is in these little units. You will get reasonable sound from them, but they are pretty small overall and won't have nearly the bass response of larger speakers on the market.
It really depends on what you are trying to get out of these speakers, and knowing that a proper bookshelf or tower could give you much better overall sound, but not the same portability.