looking for perfection!

[radio nut]

Once again I am inclined to ask a question about a very slight sound buzz.
I went through my Muntz again, readjusted everything and still.......a very slight buzz in the speaker.
Rechecked lead dress, tubes even ran each adjustment all the way either direction and still.....buzz. Not bad, hardly noticeable, but I would like perfection. A proper recalibrate, ok without a scope but using the vtvm calibration set up on the diagram and its still there.
oK, "IF" I remember correctly someone had stated that a cheaper dvd player could cause this.
Am I looking for perfect sound where it's not going to happen?