Don't think Stereophile likes people posting their IP. Probably best to just summarise in your own wordsFrom that Stereophile Aug 2019 review:
Kalman Rubinson wrote a very complementary review and JA's says to conclude his measurements: "all I can say is "Wow!"
FR +/- 1.4 dB from 200Hz to 15KHz.
Don't think Stereophile likes people posting their IP. Probably best to just summarise in your own words
The green trace above 200Hz in fig.2 shows the D&D speaker's farfield response with an analog input signal, averaged across a 30° horizontal window centered on the tweeter axis. The response is superbly flat, remaining within ±1.4dB limits from 200Hz to 15kHz! However, the output rolls off sharply above 20kHz, reaching full stop-band attenuation just above 24kHz. This suggests that the 8c's internal digital signal processing operates with a sample rate of 48kHz.
https://www.stereophile.com/content/dutch-dutch-8c-active-loudspeaker-system-measurements
Fig.2 Dutch & Dutch 8C, anechoic response on tweeter axis at 50", averaged across 30° horizontal window and corrected for microphone response, with the nearfield woofer (blue) and subwoofer (red) responses and their complex sum (green), respectively plotted below 300Hz, 350Hz, and 300Hz.
The 8c's cumulative spectral-decay plot (fig.6) is one of the cleanest I have measured, especially in the treble! In summing up the Dutch & Dutch 8c's measured performance, all I can say is "Wow!"—John Atkinson
What are these equivalents?I’d love to seem them side by side with the equivalent KEF or Revel.
Do they do any off axis measurements these days?Then again, HiFi News had the KEF R3 measuring very close to the Kii.
There are some really fine measuring speakers available, the Kiis/8Cs have an advantage though when the speaker is actually placed in a room.
It is immediately apparent when you hear them compared side by side with any other design.