
Firstly mine was unopened, contained everything and was registered online with no problems. Now. I'm a huge fan! I don't use any other headphones or speakers because nothing compares to them. It ruined them all, but I'm not complaining. They have a very heavy bass but I don't mind and don't think it ruins the song but I like the bass. I also had 1 pair of Sennheiser headphones. before that HD1. Both have very clear left and right ears and you can tell what layers (lead vocals, backgrounds etc.) these EI80s have now, which the HD1 lacked, ugh. It's two worlds together and it's great. Maybe not for everyone, but I recommend it. But what do I know, I'm not a hardcore audiophile. I just like music

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