Thanks Helson for your insight .
I doubt that I will use the headphone jack on my 976 either, yet before my wife passed away over a year ago I did use it on the 990 often..
She would watch a movie, I would plug in the phones and read when I did not care to watch.
So while it may constitute an afterthought to some , it is a nice feature to us that use/d it.
This is the same situation that Orca is in. Headphone use for him is often enough to where it has raised concerns .
Since you are more knowledgeable than me, could he turn his amp ' Off" to remedy his problem with the 975 while listening to headphones ?
I suspect it could not be as simple as that or it should have been mentioned..

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