Believe what you like, but unknown?
You're coming a little late to the party.
I knew of Octava over 13 years ago when I was reviewed the MC012 and then the MK219.
Harvey Gerst knew enough about them and me back in 2001.
http://homerecording.com/bbs/showthread.php?t=24914
Myles Boisen talked to me 'bout them in 1999.
http://www.royerlabs.com/articles/EM0599.html
Regards,
Ty Ford