I agree that no measurements are offered, I only had a few sparse contacts lately with the owner but we didn't discuss the measurements or the status.
Yes, the owner choose to focus on one product.
1,5 years back he was working on a smaller version but decided tot focus on the top model the K7.
There is now an "upgraded" version of the K7 with a Berylium tweeter from SEAS and I believe also the mid speakers are upgraded. I was invited by the owner to check out this version at the audio show in Munich but I wasn't able to visit.
KADaudio is essentially a one man business so very small.