Sony DVP-NS999ES - Manual (Page 25)

ES Series DVD-Video/CD/SA-CD Players; Version 3.0 Page 25
board. This suppresses noise caused by fluctuations in the power supply and
other externally-induced voltages.
On the DVP-NS999ES, the Sony CXD9675R (left) is a high
performance audio D/A converter for 5.1-channel output. A separate
D/A converter, the Sony CXD9674TN (right) serves two-channel stereo
sources.
Separate analog audio circuit board
(DVP-NS999ES, NC555ES)
The digital audio, digital video, analog video and servo control circuits
inside a DVD player are potential sources of radiated noise. Low-level signals in
the analog audio circuits are particularly susceptible to this noise. That's why the
DVP-NS999ES and NC555ES isolate the analog audio circuits on their own
board. It's one more measure to help maintain the purity of both DVD-Video
sound tracks, and Super Audio CD music.
In addition, the DVP-NS999ES uses six separate, identical audio circuits
to handle the 5.1 channels. This ensures uniform frequency response and gain
characteristics at the output. Sony's careful design not only maintains the sonic
purity of multi-channel Super Audio CD signals, but also preserves the crucial
left/right and front/rear symmetry of 5.1 DVD-Video surround signals.
On the DVP-NC555ES, a separate printed circuit board for analog audio
employs six separate, identical circuits to handle the 5.1 channels of
output.