[Matsumoto99]

Today my sr80s arrived and i noticed that when i turn the volume up/down i can hear a strange sound coming from the left pad...
Have you ever experienced a similiar problem with these and other cans?
I never experienced so i need you to tell me if i should send back the cans or what...
Thank you.

 

[Cheeznuklz]

From the pad, or just the left side?
Try plugging them into different sources to insure the problem is actually the SR80s.

 

[Matsumoto99]

Sorry, i'm really a noob. With "left pad" I mean  the physical left part of the cans, the left driver.
If i directly plug them into the the pc i can't hear it.
If I connect the pc to the hifi amp (pc low volumes and amp at max) and then plug them into the headphones out i can hear it with the grados but not with the crappy wescs.
If i turn up all the volumes at max (pc and amp) i can hear distortion only from the left driver, but i'm talking about dangerous volumes and i don't wanna try to do it again.
 
EDIT: I can hear that sound turning up/down both pc and amp volumes in the second setting (pc->amp->sr80s)

 

[Cheeznuklz]

The problem is very likely not the headphones, you're just pushing your amp to distortion.  Put your PC volume around the middle so you don't have to crank the amp so hard.

 

[Matsumoto99]

ME - Epic Fail.
Thank you, problem solved.