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Can a jolt in voltage cause one side's IEM to be lower in volume than the other side's IEM?


Moderator<br>Digital & Video Cameras
Jan 2, 2006
I have a pair of Westone W60 In-Ear Monitors. I had them plugged into my USB DragonFly Red DAC and a fall caused the DragonFly Red to bend at the USB plug portion while they were plugged into my tablet and playing music. Afterwards I noticed that the right IEM became consistently lower in volume than the left side.

I put them through a tone generator and can confirm that the volume is lower for every frequency on the right IEM, so it's not like one of the numerous drivers is broken. The same thing happens on different cables and different audio sources, not just the DragonFly DAC, and the audio ports are clean of earwax so there's definitely something going on with the IEM itself. I've had to use equalizers to change the audio balance to compensate on all devices.

So both sides are receiving the same voltage and current through the source and cables, but one side is higher in volume than the other.

I understand that higher impedance will lower the volume coming out of a driver, so did the internal resistance of the right IEM somehow become permanently higher than the left side due to the fall while it was plugged in and receiving output from the DAC that got bent? The DAC is capable of outputting 2.1V.
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