The response from the owner of Tekton is interesting.
Also, here is an excerpt from the review if you want to skip all the graphs and sciency stuff...
Note the date:
As of this date, April 11, 2024, despite promising otherwise, company has NOT provided any measurements of any kind for this speaker. I have repeatedly asked Eric Alexander, company founder and designer, both in emails and in this thread to do so but he has refused. Yet, he has demanded that I delete the review or he would litigate against me and ask for damages. Until such time that he proves with measurements that he has a case, this review will stand.