hifi engine

Sony Dvp ns3100es as a cd & sacd player

I was using Sony dvpns3100es as a cd & sacd player. Upon upgrading my speakers
I found the sound a bit shrill. I then hooked up my Sony cdp620es , and what a difference, smoother richer, fuller sound.
I did some research on the Dvpns3100es , and was surprised to find, one blog . This
person was using the right/left audio out from the 5.1 out section. In the menu it was
changed to no sub- no centre-no rear speakers. So i tried it , and what a difference ,
impressive clarity , my only hesitation is , am I getting all the sound I should.
If any one has opinions re this method versus the normal audio out left/right.
I would appreciate it . thanks Mike