I has AQ Lapis Truth silver/air interconnects and the equivalent copper/air digital cable for many years, probably fifteen, up to about six years ago. I got those particular cables after hearing them over an extended period of time on a very big high power all handmade Class A tube system over at BWS Consulting who at the time sold enormous high power $30K tube amps, 600 pounds delivered. Can you say open, extended, dynamic?