The DAC that D99 uses is a 1 BIT CXD8178, is also appears in D303 (Main Broad Ver14).
The DAC that D90 uses is a 16BIT CXD1161, also D25 uses a 16BIT DAC PCM66.
I never denied that D99 has a wonderful sound; however, as I said, I I have many top models.
Personally, I used to listen like D10 or Grundig cdp50, also I believe D99 was a little chubby.
If turn off the EQ of D99, I donnot think it will be better than D25 too much. On the other hand,
the failure rate of D99 was much higher than D25 for every D99 would encounter the capacitors' issues,
while such problems never happened in D25.
Bacause the Asian version of this bulletin was so helpful to vintage PCDP lovers，we cannot recommend a high
failure rate machine like D99 to them.
After all this is service bulletin, we focus more on technique rather than sound quality easimate.
If you have any technical problem, just feel free to ask.