Looking closer at the A2.4, which is the newer generation – while it is a horizontal center speaker, we may be able to glean something. And, in the link I posted, they provided its measurements, which also included an average. They did not give an average for the A1.5. Here is that average for the A2.4:
View attachment 149616
That looks more or less looks like a compressed and smoothed version of what
@amirm posted, with the 100 dB scale
@MZKM mentioned.
The designer has gone out of his way over the years to downplay the importance of measurements, providing smoothed results or sometimes scaled differently and even sometimes missing the vertical axis labels. I'll let you draw your own conclusions.
At this point I'm not sure we need a 2nd sample, but that tweeter distortion is worrying.