Apart from Sony (and Apple of course) for which I must admit the quality of their product rather with Bose here we go upstairs.
I do not want to put more than 100 euros in a helmet but I have to go to Clearly, today there is nothing sound quality below that price: We must recognize the truth. There are 10/15 years 400 francs (yes !! Excuse me talk about honest, any one time) you had the + or -top. Today at 50 euros you have nothing, so take Chinese stuff to 5 euros if your Apple earphones you it rip. it is similar.
But back to dear (and expensive in euros) Bose headphones. I who desteste-ear, they are perfect, they keep well in your ears. They isolate you from the street noise but not much. These are not "hearing suppositories" like other brands !! Bose is nickel.
As for sound quality, great, a little low but not too great and powerful. It changes my apple earphones or at most I could not hear my podcasts in the street with all environmental buits.
Low in today headphones are wound: Boom, Boom, Boom. I love that my bass but true: That of Mark King of Level 42 or that of Marcus Miller. The bass headphones of today are like salt in the kitchen, a high dose that becomes inedible.
You understand, I highly recommend these headphones for iPhone and Android .Attention there is an android version, it is not one for which I write this comment because the volume / stall call buttons will not operate. You'll love Bose if you like music, true, not that of ...... you understand, like me. Besides Bose only headphones and speakers not like the others.
Ps: I am not part of the Bose company, I assure you, I would have liked so I would not spend $ 100 + for this product -:) ...