I have read some of this thread, but not all. I like what you guys were saying about snake oil, smoke and mirrors, etc., and how listening equipment should be transparent. This is scientifically objective. It's up to the producer to make it sound good, which is artistically subjective. If you disagree with the producer and like more bass, fine... turn up your subwoofer, but the starting place should be measurably transparent reproduction.
It's obvious to me that some equipment changes audio signals. Quality speakers for instance, clearly sound vastly different from cheap speakers. On the other hand, bits passed through an expensive digital cable are identical to bits passed through a cheap digital cable.
Some equipment however, I just don't know about. Do amplifiers sound different from one another? How about digital to analog converters? I know too little about how they operate to draw my own conclusions. I would like to know these things, because I personally don't sleep better having given hard-earned money to support a false industry. I'd rather invest in something worthwhile.
Okay so that was just my bases for inquiring about the original topic, and I guess a little introduction sine this is my first post.

I wanted you to know where I'm coming from, and looking for real, authentic solution. I don't want any snake oil.
So maybe I didn't read the right posts, but what was the conclusion about noise in audio monitors? I would like to know, what are the possible causes, and corresponding solution for each cause? I have read a couple of articles about this, but they don't really give the information straight.
And by the way, the reason I am asking, I have a pair of KRK Rokit 5's and they are not used for recording, just for listening, and connected to my PC. I want to eliminate all sources of noise, like when I move my mouse and noise comes from the speakers, and like when I turn the amplifier up a bit with no signal going in, but hear some hiss.
I can describe my situation more later, but I thought monitor noise is common enough, there should be a clearly written primer somewhere that describes all sources and solutions. The problem is that I need some experienced folk like you guys to help me label the snake oil.