Herb Reichert's / Stereophile’s review of the Tekton Design Impact Monitor is now up on their site:
https://www.stereophile.com/content/tekton-design-impact-monitor-loudspeaker
This just further proves what @shadorne and I said about the design all along.
"The tweeter array becomes gradually more directional as the frequency increases [above 'the cursor position at 3.8kHz.']"
"In the vertical plane (fig.5), the use of two woofers spaced relatively far apart leads to major cancellations in the midrange above and below the response on the central tweeter axis, which again appears as a straight line. The Impact Monitor's vertical radiation pattern suggests that the speaker needs to be listened to within a narrow window centered on the central tweeter axis if the midrange balance is not to sound colored."