OK Piccolo, I listened to your flac file. I also just read your Etyheiser ER-650 link. I did hear the resemblance even though I could hear a greater treble extension with bigger sound stage on the 650.
I also understand that your personal setting with a dip of 5dB at 6kHz may not work for me as it does for you, but still, it sounded good and was closer to that relaxed 650 sound. The bass boost is my biggest need for the ER4. I have no problem with upper mids that seem to be what some hear as being too bright. If the ER4 extended easily up to 18KHz they would be silky smooth.
I also understand that your personal setting with a dip of 5dB at 6kHz may not work for me as it does for you, but still, it sounded good and was closer to that relaxed 650 sound. The bass boost is my biggest need for the ER4. I have no problem with upper mids that seem to be what some hear as being too bright. If the ER4 extended easily up to 18KHz they would be silky smooth.