I know about 2 serious vendor : Little diode ; Rochester Electronics. This last sell K grade at 52 dollars, but 5 pieces minimum order ! I need just one
It is not the AD1865 version that is most important for good sound !
The other parts of the "speelgoed"DAK do a lot more.
of course a would like to hear the DAK with a real AD1865 K.
With 2 times AD1865 JK the DAK is really singing, come and listen to it.
Anybody who knows more about where these JK versions do come from or, are they fake please tell us.