iKnowThingsI think these are perfectly acceptable for outdoor usage. It depends on the environment. I would never use these in a subway or on a train but they're perfect in less noisy outdoor environments. Since they're semi-open they block some sound but not all and that can be great if you're walking somewhere and need to be able to hear traffic, for an example.
@Messed Increasing the volume will increase the amount of leakage that others hear from the L1. If you need something to keep sound from bothering others then these may not be the ones for you.
AxelClorisThanks. But I read a review saying that the leakage sound is hardly can hear by others unless they get close to the L1. I am little confused now...
MessedIf you're sitting next to a person in an office then they'll probably hear your music. If you're outdoors at a park and about 2-3 feet from someone they likely won't hear your music. And if you're in a loud subway I doubt anyone would hear it either. Leakage is all relative to your environment and listening levels. The louder you have a song playing the higher the chances are that someone else will hear it but the environment can be loud enough to prevent others from hearing it.
AxelClorisWhat about on a plane? On a train? In a box with a fox? On a boat with a goat?
Seriously though, could I use these on a plane to watch a movie at a moderate volume without disturbing the passenger next to me?
UsernameHi, while having no experience with the L1, I do own a pair of Sennheiser HD598 which are marketed as open-back headphones, and was able to listen to music at moderate volume on an airplane without others noticing, mainly due to the amount of engine noise. However, it is inevitable that the music's details and dynamics will be lost, hence the noise, so while still doable, I wouldn't choose open-back headphones over closed-back when it comes to noisy environment.
Hope that helps!
UsernameMost people don't use these kind of headphones on an airplane. (If any bit is heard by a fellow passenger and prevents them from sleeping it'll be kinda rude i guess?) The type of headphones typically used are like Bose Quiet Comfort which is closed and features active noise cancelling (this way you enjoy your music at its best, without needing to disturb others!)
Hope this helps your decision, i got this purely for indoor usage when im doing work (it's funny how many calls I can miss out on when i use my other pairs)