dhruvmeena96
Headphoneus Supremus
CD900 was amorphous diamond diaphragm and sarium cobalt magnetV7 was not the original name for the CD900ST. It was a similar headphone that was marketed in other countries while Japan had the CD900 (non-ST). If I remember correctly, the driver material was slightly different between the two and I can't remember the name off the top of my head, and there was a debate back then that one sounded better than the other but I was still young back then and I personally couldn't hear the difference. Otherwise, they were pretty much identical and CD900 came out before the V7. Around the time the CD900 was discontinued was when the CD900St came out and has the, now more common, PET/mylar material used in the driver but was also marketed as a very easy to repair pair of headphones. A couple years after the CD900ST debut, the mod community became pretty big for it's time in Japan and that's when I decided to buy my first CD900ST. Since then, I think I've bought like 4 more pairs because I either lost it or broke it beyond repair and it was easier to buy a new pair but yeah, it's one of my favorites, partly because I know the sound signature of it better then anything else. ...and on a side note, I've been the only one to my knowledge walking around with a pair at all the CanJam's I've been to and rarely do I get approached by someone who knows about it and we become friends. I was sad though when one time, no one from the Sony booth knew what it was because they were hired to sit at the booth...
CD900SBS was later introduced with same diaphragm but neodymium magnet.
CD900ST was Japan only mass production which was further tuned and was having N50 magnets but mylar liquid sandwich diaphragm.(today Sony calls it Liquid crystal polymer due to advanced manufacturing method).
Here....new mod for CD900ST to make it sound even better
https://gigazine.net/gsc_news/en/20140309-sony-mdr-cd900st-customize
Solving driver crosstalk issue and utilising all the connecting points/pads on driver