Hi, I recently bought a Sennheiser PC 350 SE headset, and when compared to my Corsair 1500s, it actually sounds worse in everything but bass. It sounds like the audio is being played through a thin wall or something. I've read other posts that say I might need an amp but they didn't give a lot of info. Could that be the issue? I don't know what my sound card is/if I even have one. Thanks.