I know this is an old thread, so for anyone researching the Cayin. . .
I've got the Cayin H-80A and there is no trace of hum. Maybe the previous poster had a defective unit or some other interference. I don't have any experience with the Ayre but the H-80A has amazing resolution and clarity.
I've got the Cayin H-80A and there is no trace of hum. Maybe the previous poster had a defective unit or some other interference. I don't have any experience with the Ayre but the H-80A has amazing resolution and clarity.