BlakeMorrowThey don't bleed all that much. It's very minimal when compared to a lot of my other open headphones, but they don't isolate either. Stick these on your head and the sound of your environment is not attenuated at all (or almost not at all). You'll have to turn things up to drown out the noises around you, and that will increase your bleed.
BlakeMorrowIf they bleed sound everywhere you are playing them at a level that wil damage your hearing. Of course the more your hearing gets damaged, the louder you will need to listen! Hope it's not too late.