k850i using k810i acoustic driver

very good . driver sound k810 ??

no...............

Hi all

I'm new to this , but I guess I shall be spending quite a bit of time here as there seems to be so much going on! I'm hoping to make some new friends
Take care!

Hi plz help me

My k850i is very poor quality of sound in walkman headphones!!
Pleas Tell me what i should to do to make it batter like k750i and k810i etc???