First thing I must say is I love the sound of my shures!I know the shure 940 doesnt need a amp to sound good but how much of a difference can an amp make and which amp works best with the 940?If someone that has experience the 940 with and without an amp could please reply, it would be appreciated.

why does pink floyd albums sound so much better than any other albums on my headphones?yet u2 no line in the horizon among other albums I own  has a mid bass issues.My headphones are shure 840 and I love sound sound from top to bottom on these phones other than that mid bass issue.Is it just the...