Is there a sound differance between the Roxanne's as uiems vs ciems? Which has the better seal? I've heard ciems have a poor seal if you change the position of your jaw, is that true?
And no, only poorly made ciems have a bad seal. Various reasons: bad earmolds, bad finishing etc
normally it's the opposite: custom are like your ears, so it's logic they have better isolation!
I can eat an apple with my custom without loosing the seal.
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