Sound quality is excellent.

Good sound quality

Excellent sound quality for classical music.

Note, I initially planned to run the Marantz CD player through my NAD M51 DAC, but after running the optical through the DAC & straight to the pre-amp, the sound quality was simply too disappointing; the truly great part is when I simply ran the CD player's built in DAC

The quality of the sound is great until it abruptly skips