Is someone using it on Sony MZR-909 MiniDisc ? 10x

Hi to all , First of all , thanks for all on the help with the Frequency Response thing . I would like to know if one of you is using this headphone on portable devices , like CDPlayer or MiniDisc . Thanks

Thank you all for your fast reply . My question camed after I read the spec. of two Sony Headphones . One is MDR-CD3000 and the other one is MDR-CD2000. MDR-CD3000 is way way up with the price and the FR is 20-20kz. MDR-CD2000 is lower price and it's FR is 5-30kz. So how should I...

Hi to all , I am looking for a good headphone to buy . What is best Frequency Response that I can find and what should I look for ? Example : 5-30hz or 20-20hz 10x