This morning I have done some listening comparison between the the left driver with the "Black Pearl" fazer beads mod and the un-mod right driver of my HE-500.
The HE-500 is with the HE-560 production Focus pads. I use foorbar2000 for playback so I can activate the stereo channel reverse and stereo to mono down mix at time of playing for comparison.
To my surprise, the most obvious effect of the mod is sound stage. On the mod left driver side, the sound seems coming more from before my head and less coming from the side. I have confirmed this by reversing channel. The sound stage on the left hand side has more depth and is more "out of my head". Sound coming from the un-mod right side driver seems more "substantial", where at times I can feel the sound is directly coming out from the driver diaphragm.
It is actually quite funny listening to this uneven sound stage. It is like you are sitting in on the right hand side in a concert hall, with the wall on the right closer to you. The musicians and instruments on the left is more away and spread out.
I was expecting to have music note coming from the left to be more "defined" like the people are saying with their LCD Fazer. But I don't feel that with my Black Pearl mod. I do feel the sound from the left decays a little bit faster now.
Overall the result is not what I was expecting, but I like the change of the sound stage effect very much. I expect with both drivers modified, the sound of the HE-500 will be more "out of my head".
Edited by borrego - 8/19/14 at 10:29pm