I wish I could find what I had researched... but it was now a couple of years ago, and my searching is coming up empty.
The studies primarily had to do with replication of frequency and amplitude from source to end, the trueness of what came in to what came out at the same time in phase... there were other aspects that I cannot recall, but differences did exist.
Using high end gear (somewhat better that I bought) there was a difference in clarity.
Claim what you will... All I ask is that everyone test with their own ears. Personally, I like the sound of KEF products.
