@amir_asr
The measurements you do on speakers is actually the least useful, see:
Acoustic measurements for our uses are of three principle varieties.
- • To measure the acoustic response of a loudspeaker, usually exclusive of the environment. (this is ASR)
- • To measure the acoustic sound field in a room, usually inclusive of the response of the loudspeaker. (this is my point in the above post)
- • To measure the noise level in a space.
The first two are closely related measures since room response and loudspeaker response are tightly coupled. The first measure is by far the most common, but, as we shall see, they are usually inadequate as an indicator of how the second measure will come out. Of course, what we want is a correct room response
(Earl Geddes: Premium Home Theater Design and Construction, CH 5)