Marantz SA8005 Variable Output and Bit Depth?

[absolutehifi]

Hi, I am using my Marantz SA8005 to drive a power amp directly. This is possible because the SA8005 comes with variable outputs. I appreciate the simplicity and minimalistic approach, but wonder if using the variable output will reduce the bit depth and lower the sound quality (audible or not). Does anyone here you have any data, information, or experience with this? Thank you!