Thanks
@amirm!
I measured this speaker a while back, and I enjoyed it quite a bit. Some flaws, but it seems to do well on your klippel too other than that (imo minor) resonance.
Back then, I was only measuring in 15 degree intervals and doing incomplete rear measurements, but I do think it can be interesting to compare the data. In some respects, my measurements are closer to the company results, although mine have a slight downward tilt.
As a casual observation, I do note once again that a speaker with narrower horizontal directivity did not excite you as much as the wider directivity ones. Though the S400 seems a bit wider than the usual big waveguide speaker, perhaps because of that little tweeter.
Anyway, for comparison, here's my spin based on 15-degree intervals, measured between tweeter and waveguide:
While the crossover dip is present in the bigger averaged curves, I did not get the same crossover big dip in the horizontal data. My polar looks closer to the company's; there's a slight scoop but not bad:
Also visible is the SPL plot, where the bit of off-axis energy is flattened out off axis.
I noted in my vertical measurements that the S400 is
extremely sensitive to vertical positioning within the listening window. I think the most sensitive of any speaker I've tested. Here's the speaker at 0/5/10/15/30 degrees vertical.
Look at the difference happening just 5 degrees below the stated reference axis, for instance:
It instead clears up significantly at steeper vertical angles:
I liked it, but noticed I did not like it in the nearflied, I suspect because of that finicky vertical positioning. In the Fairfield I did not have that problem, although I took care to align the reference axis properly.
I'd still consider these great results in the grand scheme of things for a small internet-direct personally, but your mileage may vary.