This is Yamaha DA8X which has 8 pcs PCM63p-Y or KY inside. Not much audio grade resistors in this model but it still have Elna Duorex and Nichicon Muse capacitors. The PCM63 chips are tuned to lowest distortion by two VRs next to the DAC. No chance to hear how it sounds but the digital filter is NPC SM5803APT (lower grade than SM5842APT).
Price of this from ebay can be cheap as not much studio is using it due to 20bit resolution only. So it is a good target to get the KY or Y chips inside! Good luck!
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See pictures:
