So I own a pair of Ultrasone PRO 550's and today I decided to remove the left and right foam ear pads and just interchange them. This is the first time I am ever doing this. Immediately after doing this I noticed that the left channel has more bass than the right channel. I thought I was imagining things, so I switched the pads back and now the right channel had more bass! Before swapping the pads both had the same amount of bass.
What is going on? I cannot for the life of me find any difference between the two cups. There are no cuts in the material. I checked everywhere! Has anyone had an issue like this or do they know a solution?