From the Sony document:
"The audio boards of this SCD-XA5400ES employ glass epoxy four-layer boards. This makes the signal, ground, and power supply wiring ideal. Right and left circuits including balanced circuits are laid out quite symmetrically, playing a roll in generation of a clear stereo image."
"The audio boards of this SCD-XA5400ES employ glass epoxy four-layer boards. This makes the signal, ground, and power supply wiring ideal. Right and left circuits including balanced circuits are laid out quite symmetrically, playing a roll in generation of a clear stereo image."