Check out the Tekton Owner's Group on FB. The Matrix LS was built as a custom order for one of our members. Similar to ordering a Moab with all-Be, it has an additional Be tweeter and midrange driver radiating fill on the back. This worked out so well Eric decided to make it the first in his Signature line.
His is the only one we know for sure has been made, and he is pretty darn pleased with the results. Which were good enough for Eric to make it a model. Check it out on FB.