[Insederec]

I've had my DT880 pros (with a Fiio e6) for several months now, and I've recently noticed a very quiet but very noticeable ringing noise. At first I thought it was just my ears, but when I lifted up one cup off my ear, I could hear the ringing in the other ear but not that one. It seems to go away when there is a signal through the headphones, and it may just be my imagination, but I think it gets louder the longer I listen to it.
This is incredibly annoying, and I would appreciate some help with this issue as soon as possible.

 

[Amorgan]

Hello, 
have you tried plugging them to another source? (portable player, receiver, computer)

 

[Insederec]

I just did, and it seems that it only rings when I put the e6 next to my usb hub. Is this some form of interference?

 

[fabio-fi]

Quote:

I just did, and it seems that it only rings when I put the e6 next to my usb hub. Is this some form of interference?

 
If this happens next to a usb hub, that interference comes from your PC. Try using a USB splitter. 

 

[Insederec]

Correction: When plugging the headphones (through the amp) into an iPod, there is no ringing, but when I plug it (again through the amp) into the usb hub there is a very quiet whistling/high pitched hum. I am using the amp now without plugging it in, and there is no background noise. 
I suppose I'll just have to live with it until I can get a better setup. As it is I can't adjust anything at all, so I'm stuck with a short usb cable right next to the hub. Maybe in the future when I get an e7 and a bigger desk everything will sort itself out. Thank you for the help, anyway... 

 

[fabio-fi]

Quote:

Correction: When plugging the headphones (through the amp) into an iPod, there is no ringing, but when I plug it (again through the amp) into the usb hub there is a very quiet whistling/high pitched hum. I am using the amp now without plugging it in, and there is no background noise. 
I suppose I'll just have to live with it until I can get a better setup. As it is I can't adjust anything at all, so I'm stuck with a short usb cable right next to the hub. Maybe in the future when I get an e7 and a bigger desk everything will sort itself out. Thank you for the help, anyway... 

 
Yep, i understand. It happened to me when i used an E5 plugged to the PC via usb. Reason: its because they are poorly shielded (or not shielded at all) however when i bought an amp/dac the issue was gone.