Good topic. Based on my experience modifying a Sony SCD-1 (which doesn't use the most current DAC chip or paralleled DACs or upsampling techniques) I would assign equal weight to improvements made in the digital & analog domains. But I'm talking about a host of mods other than changing the DAC chipset itself. It's surprising how much sonic improvement can be teased out without changing the underlying DAC. Most current-production CDPs with the latest DACs are compromised in so many ways that it's pretty much useless to compare players based solely upon choice of DAC or upsampling technique. And yet some forum posters never get beyond this point.
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