Wrong stereo5, and I have proof below. 2 internal pics of the analog board side of the C2500 and C2600. Clearly different. ( so its not just the dac )
https://www.casimages.com/i/170104083930483890.jpg.html
https://www.casimages.com/i/17010408393284308.jpg.html
https://www.casimages.com/i/170104083930483890.jpg.html
https://www.casimages.com/i/17010408393284308.jpg.html