Spotify - Cambridge Azur 851N

 Hey thanks for the tips. 

The volume on your computer is the "master control" for the network player. Set that first.

For more control over the level, use the spotify app. If you get it just right the level will remain optimal. Are you saying the spotify app has a superior digital volume control? Sound quality would be determined by the file itself and the chips inside the unit you’re using.

Volume too high - hearing loss, problems with resolving complex music
Volume too low - missing out on important nuances and other details