My Beyerdynamic headphones (DT770 Pro) have an engraved L and R, as well as l and r in Braille. All that's a bit overkill sine the cable only attaches on one si

My Beyerdynamic headphones (DT770 Pro) have an engraved L and R, as well as l and r in Braille. All that's a bit overkill sine the cable only attaches on one side (the left) anyway, so that's the most immediate indicator – but it does make for a good experience during the first few uses. All proper headphones I have seen have some sort of feel-able indicator (if not as explicit as Beyerdynamic's), showing that at least those manufacturers know what they do.