So the treble driver is carbon nanotube and the bass driver is carbon diaphragm. Excellent! I already have a feeling this will be my premier headphone (blowing my A900X away - which I love). There will no need for me to buy the WS99. Brass with a silver cable. I definitely don't need to repurchase the FXZ200. I can be satisfied with my FXZ100 and the SZ200. I'm willing to be that the price drops down quickly from $350 and some change. This looks to be my dream headphone! I'm excited!