[Kozic]

I have a Harmon kardon avr and just started to use the phone jack. There is a humming in the background it's bad enough that in a quite ( I mean just above a whisper ) part of a song it's hard to make out what's being sung or anything else. I have tried 2 sets of headphone both the same hum. Is this what you get through a receiver or I have something up with it?
Any thoughts thanks

 

[billybob_jcv]

You should not hear a hum. What specific headphones are you using? Do you have the receiver plugged into a grounded outlet? Is it plugged into a power strip or directly into the wall? Do you hear the hum from speakers attached to the receiver, or only from the headphones?

 

[Kozic]

OK DT990 250 ohms, grounded power strip, at full volume maybe just a hit out of speakers and when I mute hum stops.

Thanks
Just tried plugging into wall and may have done the trick.
Nope spoke to quick it's still there.

 

[billybob_jcv]

Sorry - I'm out of my depth here. I suspect some sort of grounding issue, but I really have no idea.

 

[Kozic]

Pulled out my old Yamaha works just fine on same outlet calling HK now.
Thanks