sorry i cant give you any info on the em9, but i did had the em7. they are very small, about inches wide in diameter, dont be fooled by audiocubes pics. the earpads is sewn/glued into the headphone, you cant remove it, but they are comfortable. the earclip is uncomfortable to me because when i put it on, the rubber thing slide to the side and only the metal clip rest on my ears. other people might have better luck.
they are very open, leaks about 75% of what grado does. very bright, very detailed, very little bass. someone else who had the ew9 said it have plenty of bass though.
oh and the em7 come with a little zipper pouch.