DS502 - high-pitched beeping/intermittent tone

[whiskeywolf458]

Friend sent me his old (lightly used) DS502 headset earlier this week after my old Logitech unit broke (since I know someone'll ask - G430, one of the hinge cover plates gave out). First thing I noticed/heard is this insanely annoying high-pitched beeping/tone from the left side.

Has anyone else ever had this issue? If so, were you able to fix it somehow? This is driving me insane, because the Goddamn tone is *RIGHT* on the edge of what I can actually hear and what blends into my tinnitus.

Yes, I know it's an issue with this specific headset because it doesn't happen with my old Skullcandy Hesh 2.0s or my now-replaced Logitech G430.

 

[whiskeywolf458]

Update: Issue only happens if I have the in-line volume control at or near max. Dialing back about 1/4 turn on the dial fixes the issue, or at least seems to. Still curious to know if anyone else has noticed this, or if maybe it's a flaw with my specific unit.