Here's a quote from TRL home page with which I couldn't agree more.
"Tube Research Labs typically does not publish traditional measurements on it's equipment's performance. These measurements illustrate how machines hear, not how humans hear. We probably are years away from having measurements which we can really associate to or correlate with the listenability of a device."
"Tube Research Labs typically does not publish traditional measurements on it's equipment's performance. These measurements illustrate how machines hear, not how humans hear. We probably are years away from having measurements which we can really associate to or correlate with the listenability of a device."