If you get a good DAC then you you don't need to do anything to the Oppo. I have a Halo May DAC with the 203 and an I2S to HDMI converter that I can play all my cd's through including SACDs. Works and sounds great!!!
Don’t take offence , the very best upgrade hands down to my EMM Labs player was replacing it with a Innuos Zenith 3 server . There are a number of reasons why a decent server is far better then a disc player , sound quality is one reason.
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