I have always used fairly cheapy headphones around the 20-30 mark and onboard audio.

Recently I decided to go for a pair of reasonably expensive (£90-is to me for headphones!) wireless jobbies, mostly because its always a matter of time before I step on them, or they get wrapped around my chair and when I get up, stuff flies everywhere etc

So I have just got a set of Sennheiser RS 140 Wireless Balanced Headphones which got rave reviews, but my problem is they sound shit!



http://www.amazon.co.uk/Sennheiser-140-Wirele...41-1110321

I suspect it's because I don't have enough power to get the best from them, so what do I need to get the best out of these headphones?

A soundcard or a seperate amp or?

Thanks