Vienna speakers sure sound different - a rather unconventional or odd measured response. That new HF/mid drive unit is scary - it has a magnet no bigger than a tweeter and produces the most Q resonances I have seen in a long time. Most designers would be concerned with the response of the KISS through the mid range and lower treble, as Atkinson alludes
https://www.stereophile.com/content/vienna-acoustics-klimt-kiss-loudspeaker-measurements
https://www.stereophile.com/content/vienna-acoustics-klimt-kiss-loudspeaker-measurements