Klippel driver measurements are of course nice to have but I agree that posts here with on/off axis, T/S, THD etc. are also valuable.
The challenge could be measurement setup and equipment consistency. For example, test wall dimensions, back side test baffle profile, measurement distance...
Anyone else interested in seeing ASR add raw driver reviews with measurements?
ASR already has the required equipment perhaps with the exception of a IEC baffle but that's an easy afternoon build.
I think such objective reviews would be of great benefit to the DIY sector of the audio community.
I hadn't read any 3.1 reviews but now that you mention it, the review seems to confirm the lack of acoustic QC.
1) "without EQ, you may find the sound a bit annoying". That doesn't sound like a strong recommendation to me.
2) One speaker was measured. It would be informative to see...
Below is a graph with the amplitude response of eight HiVi SD1.1A tweeters , seven from the same batch. Measured at 1M and mounted in a bookshelf speaker cabinet. Note the SPL difference at the 2KHz cursor position. That's a spread of 11.4dB.
I will leave you to draw your own conclusion...
@amirm , as you may already know, the tweeter near field amplitude response measurement isn't entirely correct. Would it not be more meaningful and less confusing to delete the data below, in this case, 1400Hz?