I very much doubt that, as Kingwa never anounces product upgrades (internal or external) but just does it...
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Implementation is key. At least that is what I`ve been reading all along when more knowledgeable people than me were talking about DACs or DAC chips.
Kingwa seemed to have been struggling with the SABRE chip in the past and only felt now able to do it right, i.e. implementation of this DAC chip.
As an owner of the NFB 10ES32 (Sabre) I have no complains about the DAC chip or the DAC for that matter whatsoever. But then again, I have not owned a lot of other DACs in the past.
But in about 6 weeks I will have the opportunity to compare my little pity NFB against the master-monster combination M1/M7 in my own listening environement. At least then I can tell, if an upgrade is worth the additional dough.
I might just ending up ordering the last 1704UK worldwide...
Texas Instruments, maker of PCM1704UK, has the part listed as NRND (not recommended for new designs) and states they are only supporting existing accounts for part. With laser trimming of DAC ladder resistors this part it is very difficult and time consuming to produce so increasingly expensive to make unless produced in big volume. At some point TI will pull the plug if they haven't already.
While they last Mouser Electronics has 585 chips in stock at $65 ea./100 pieces. Arrow Electronics has 77 chips. Digikey has 1 chip! I would bet that Kingwa is perhaps the largest buyer of the PCM1704UK so unless he orders them by the 1000's TI will stop support. It just doesn't make economic sense for either party.