Basically the power conditioner will "clean up your power". It will filter out the AC noise (such as RF & EMI)picked up by the giant antenna (all wire ran from the power station to your equipment) that exist in your powerline, thus your equipment gets cleaner power to work with. The end result is a lower noise floor, more of the original signal from you source to show through on your display (speakers, TV's etc.). As far as the digital outlets, what it'll do is separate the digital power from the analog power. Digital sources will emit its own digital noise back out so if the analog is plugged into the same bank as the digital, you just kind of defeated the purpose of cleaning up your power. A good power conditioner will have those problems taken care of in its design just as the digital source will as well. Just be careful, some power conditioners/surge protecters will limit your amplifier's ability to draw power at an instant notice. I hope I have clearified it a little bit for you.