My impression of the Klipschorn's sound is that the midrange has a shouty quality, and bass is thin and punchy, likely not going much below 50Hz. It's not my preferred sound.
Klipschorns, in the right room, with the right room treatment, and the right EQ, sound a lot like the live orchestras I've heard or played in. Some of those live orchestras could be "shouty" at times, as well, and seemed to have rather different frequency response balances from hall to hall, and outside, even with the same selections and instrumentalists (we toured). If freed by a very long rest during rehearsal, I would sometimes walk across the front of the orchestra in -- maybe -- row 10, and frequency balance and general sound would change every few feet in ways that would seem to not be due to the angles of incidence, but as all of you know, this can be tricky.
I've had my Khorns in several different rooms, always pressed into corners. Of the many audio stores in which I have heard them over the past 40 or so years, only 2 have had them pushed all the way into corners.
Mine "shout" only when playing a few, very early, bad, CDs.
They are capable of very high quality, especially dynamics (macro and micro), while playing the likes of Beethoven, Mahler, Sonic Highlights w/ Richard Morris and the Atlanta Brass, Miles Davis, etc.
Curves:
1) Average of 8 mic positions, which, of course, "averages out" or smooths all the curves, and Audyssey Reference (response deliberately slopes down above about 6K):
2) With Audyssey Flat (wouldn't be without it). Just 1 mic position. The graph is cut off in the deep bass because I, and most people, would use a SUB below that. Actually, I can crossover to my sub at either 60 Hz, or even 40 Hz, depending on the needs of the recording, the room PLUS the recording, and the listeners.
I read this graph as about +/- 3 dB (+ 4 and -2 above 60hz) at and above the probable crossover point. Note that each pair of the horizontal lines on the graph is 1 dB apart. This is for flat-ish recordings, with music mostly from the Classical and Romantic periods, plus Jazz and Film scores.
3) Below is a graph taken with 1 microphone, but 2 Klipschorns in the front corners of the room, which delivered slightly different bass, so were averaged. It is compensation for recordings that are highly deficient in the bass. The EQ to produce this in our room is noted across the top.
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