MarkParity
Formerly known as User9876
I loaded up a test track which happened to be Smooth Criminal (Ben Liebrand's Extended Remix)Any ER4 users here, I swear the two sound so similar.
Plugged the ER4XR into my Gryphon (all sound enhancements off) and had a listen, sounds quite nice indeed, the track is 7 minutes long and I listened one time through.
Then I quickly swapped to the ie900, wow this is like night and day. The first thing I noticed was the much larger soundstage in comparison to the ER4 then when the sub-bass hits the rumble is awesome when compared to the ER4's bass.
The highs too are better to my ears, both are quite good in the highs but for me the ie900 wins easily.
So no IMHO the ER4 is nothing like the ie900. Some may prefer one over the other but they most certainly don't sound alike.