I have enjoyed my closed AH-D2000's through the Grace m903 for some time now, but wanted to investigate open cans for two reasons. The first of which is to find a can with a nice sound stage that can image well. The last is to find an open can that is super comfortable that compliments my AH-D2000's headphone signature.
What I found so far is that through my iPod with no EQ settings the DT990's actually sound good to great. Sure I have to turn the volume up to 85%, but the bass is punchy and extended and the sound stage open as well as the highs being crisp and clear. When I plug the DT990's into the Grace m903 I lose a ton of sound stage and the frequency spectrum seems damped especially the bass.
My questions to you all are:
1.) Have you had a similar experience with amping the DT990 with various amps?
2.) Why would the iPod sound more even and open whereas the m903 flat and bassless?
Some tracks do sound very nice, but in general the iPod sounds better per average track.
Any help would be greatly appreciated.
160kbps or greater mp3's ( I have tried CD's as well )
USB to m903 DAC
m903 Headphone out to DT990 ( 250 Ohms )
Edited by NA Blur - 9/7/11 at 8:42am