After my very hard research with my own money(Bought another Wadia 9 to compare). The answers to my Question as follow :
There are 3 chips (one big & two small which next to the AT&T cpu chips)inside the digital circuits board. My Wadia 9 chips are 450015-002 x 1 & 450016-002 x 2.( which I can not call out "Video mode" or "Audio Mode" according to the user manual). And the other Wadia 9's chips are 450015-004 x 1 & 150016-004 x 2.( which can call out all those "modes" according to the manual). After I've replaced my "old" chips with these "new" chips (need to pay for some engineer to duplicate that with special equipment). Then the sound quality is match its original price. And my "old" Wadia 9 sound quality was just match some few hundred dollars CD player.
I hope all other Wadia 9 users better check their internal chips series number. Otherwise you may end up paid a lot but got a little from this great DAC.
Cheers....
There are 3 chips (one big & two small which next to the AT&T cpu chips)inside the digital circuits board. My Wadia 9 chips are 450015-002 x 1 & 450016-002 x 2.( which I can not call out "Video mode" or "Audio Mode" according to the user manual). And the other Wadia 9's chips are 450015-004 x 1 & 150016-004 x 2.( which can call out all those "modes" according to the manual). After I've replaced my "old" chips with these "new" chips (need to pay for some engineer to duplicate that with special equipment). Then the sound quality is match its original price. And my "old" Wadia 9 sound quality was just match some few hundred dollars CD player.
I hope all other Wadia 9 users better check their internal chips series number. Otherwise you may end up paid a lot but got a little from this great DAC.
Cheers....