The plug for MP3 player has a loose connection after 2 months. In my view, the plug should not give up the ghost so quickly. For this reason, I have to adjust the positive rating. I can recommend these headphones with good conscience further. I bought in the meantime, the headphones' Dr. Dre Solo 2 ". These headphones to the multiples better than these headphones (better sound, better quality and better design). Now that I have a comparison, I rate the Sennheiser HD 229 headphones as scrap!