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I have a pair of T90's that I happened to notice some distortion in the left hear with low base content. I took them apart but didn't really see anything wrong anywhere. Any ideas of something else I can check?
I recently came up these beyerdynamic partially open (I think?) headphones and have been having trouble figuring out exactly what model they are. They have a toggle for each driver with four positions from closed to open. These seem to most profoundly affect the bass range. There isn't any...