Was browsing Reddit and saw a user post their impressions of the R3 with Dirac, they included the measurement in Dirac’s program, and it has a 1kHz dip:
Now, the graph that
@amirm got doesn’t show this; however,
as mentioned before, the graphs that
@napilopez got does show this:
Hi-Fi News also shows it:
But also doesn’t show up in this graph:
No difference in horizontal/vertical positioning looks to be able to cause this, weird.
Maybe KEF did some tweaks and the ones showing the dip are from the pre-fix batches? If whoever lent Amir the R3 measured his, that would be interesting.
Haha this is a small issue that somehow still bothers me every now and then about the R3
I thought it might've been distance related when I initially performed the measurement, but it also shows up in some of my in-room measurements and at 2m test I'd done. It's also in the
R11's measurements over at SoundStage network, which makes me think it's a specific issue with the R-series design:
Moreover, it's even in KEF's measurements. The R3 doesn't show it much, but there's a little blip around 900Hz:
Meanwhile, it's very apparent in the R7 and R11's measurements:
The only thing I can think of is that one complaint people had about the R3 is that the 'shadow flare' waveguide extension. was sometimes unevely set on the baffle. It's supposed to stick out a little so the Uni-Q unit doesn't 'see' the edge of the cabinet. But I'm not sure if that would have an effect as far down as 1kHz.
I also wondered if maybe there's a reflection happening against the trim ring of the woofer, which juts out a few mm from the cabinet.
Not sure if this is helpful but looking through my mess of R3 measurements (I was much less organized then, unfortunately), I do have a summation of the port and woofer. I'd done the scaling/summation wrong and for some reason didn't save my nearfield woofer measurements to fix it, which is why I didn't publish the bass splice with my measurements. But looking at what I do have, there's clearly
something going on at 1K:
It'd be interesting to know whether there was aa silent revision or if this is just a QC issue. I thought the mids were teensy recessed on the R3 and this is probably why.