Picking up on David A's point above re speaker impedance and phase plots, Archimago published an article on speaker measurements this week, see link below. For me, some of the links from the article are more interesting than the article itself, in particular the Audioholics article re impedance curves and phase angles, see the third link below. It is quite technical, but for those who are less technically minded it does include the phrase "Things are far more complicated than saying “Speaker X is 100dB sensitive, so you could power it with a potato!"
The curious use of a root vegetable as an amplifier analogy apart, this statement does seem to be consistent with the conclusion of the last few posts in this thread.
https://archimago.blogspot.com/2019/08/m...art-1.html
https://www.audioholics.com/loudspeaker-...ical-phase
https://www.audioholics.com/loudspeaker-...ase/page-2
@David A - Picking up on one point in your post above, we do actually know where the microphone is located in the video in the OP. It is a built in microphone in the video camera, this point was stated on the Harbeth forum from where the video originates. As you might expect, and consistent with what you wrote in the post above, you can clearly hear the sound change as the camera moves around the room.
The curious use of a root vegetable as an amplifier analogy apart, this statement does seem to be consistent with the conclusion of the last few posts in this thread.
https://archimago.blogspot.com/2019/08/m...art-1.html
https://www.audioholics.com/loudspeaker-...ical-phase
https://www.audioholics.com/loudspeaker-...ase/page-2
@David A - Picking up on one point in your post above, we do actually know where the microphone is located in the video in the OP. It is a built in microphone in the video camera, this point was stated on the Harbeth forum from where the video originates. As you might expect, and consistent with what you wrote in the post above, you can clearly hear the sound change as the camera moves around the room.
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