Originally Posted By: rharv
Yeah, the POTS affecting the output could definitely be a factor.
Tried cleaning them?

I don't know how to clean them. I don't believe they will come off.

Originally Posted By: Guitarhacker
Reverse the cans on your head and confirm it.

Yes, confirmed. smile

Originally Posted By: Guitarhacker
So, does the interface have a software control panel? Many do and there are input and balance controls in there as well as EQ and other things.

No. Just drivers. frown

Originally Posted By: Guitarhacker
If the other cans didn't show it to be louder on the left, that could have been done by you without knowing it. You had a deficiency in the cans and to compensate you turned one side up more in the recording process.

I've connected these headphones directly to the computer's onboard sound card and to a tablet, and they sound unbiased.