Because you've already said that with Panasonic FC you have better bass,and this is the cheapest and easiest mod by now.If you had creative ep-830 headphones,I bet you never talk about soundstage, imaging, clarity and neutral natural sound.if everything works perfect for you,I think you can accept that not everything works fine for someone else.If this was the gold,between high end players,I don't think 2 different kind of headphones would sound so bad with it,and another one,which are basshead ones,don't have so much bass at all!and please don't say go and listen music from you're smarphone,as far as I know,my last 2 years I have used Cowon j3,and that one really had the kick,but,dx50 have better "the rest",but I still find some sounds to loud and sometimes tiring,and from here comes the problem with my ears hurting me after 2 hours of listening.If you're headhones sound amazing with dx50,and changing caps made a difference,you don't know what impact will have with my headphones,and for 5gbp,I think it's worth the mod!thank you for testing them and share youre thoughts with us