There are only very few DAC manufacturers on the face of the Earth that are not happy with off-the shelf components they can simply buy, so they started developing their own chips, their own software and their own code. There are hundreds of DAC manufacturers that are using their own metal cases, they own circuit boards and engineering and everything else are off-the shelf components supplied from all over the world. When Audio-GD announced their R2R-7 DAC using they own, custom made and custom engineered R-2R DAC modules, I knew it was the end of PCM1704 and a fresh new start for Audio-GD in the digital domain. One another hand, it was the end of an era, when those PCM1704 will be completely depleted, Audio-GD will need to move on and develop their own R-2R chips like Rockna Audio and MSB Technologies are doing for more than a decade now. On one hand I was happy for them as the PCM1704 always had a strong cult following and I knew those will be implemented successfully considering the care Audio-GD is putting in the power filtering and how much importance they give to the output stage. I still remember it clearly when Audio-GD announced that they bought the latest batches of the best commercial made DAC chips from Burr-Brown, the legendary PCM1704 chips that everyone wanted to have in their digital sources.
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