Hi there,
Yes, the myths are out there. I didn't know either way, and just wanted to know if what I had found was only part of the story. It still could be, but from what you tell, it seems I am on the right track.
My interest in the "issue" was merely that I am interested in these ancient beasts, and I wanted to know what I might be getting. People will come here and copy info (not maliciously) to describe the cans they are selling. I just wanted to set the story straight (if possible) since what I found did not jive with what was stated here. BUT, let's keep in mind, 13 years ago, the internet was a different place, and perhaps all this just took time, as the web developed. I can attest, there are a load of amazing Asian pages, here and there, regarding all things vintage (players, headphones, whatever), and it is really only down to google translate for the most part, that I could have access).
I have these great V4s and I love them as much as my D9's, but I really don't know much about them (by the way, if you know if the Sony MDR-V4 have the CCAW voice coil, do tell!).
As far as quality goes, hell, even PET can sound VERY good. I expect most including and above V4 (like also V5) V6 (loads of info and kudos form them) V7 (now with your report and bits here and there) etc all will sound amazing in their own way. So good to point out that sapphire, or diamond, or titanium (whatever), which yes, do exist (diamond for Aiwa HP-D9 and HP-V99 and possibly others), or NOT, doesn't detract from their awesomeness!
Anyway, thanks for chiming in, I think it is important to get the info as correct as possible and support for that is good to see!
Cheers!!