Well, apparently VSD9's diaphragm is made of something super rare and hard to obtain, so they can produce only a limited number of units a year. Vsonic's ceo said they changed the diaphragm like 5 times until they settled on this one.
As far as Astrotec's ax60 I'm slightly interested as vsonic is still silent about their k3003 clone but it's pretty funny how the vsonic's ceo is constantly making fun of Astrotec and even offered to help them with the ax60's tuning coz they obviously didn't know what they are doing.
edit: I just saw that Rin actually measured the ax60 and his opinion is that ax60 is "more of a fun college product gone weird" LOL, so I guess vsonic's ceo has a reason to mock them.
That's an interesting culture they've got over there. Can't imagine a US brand issuing such a condescending statement about one of their competitors.