The Rotel is a 60W amp (from what I found on the web), which means with lower sensitivity monitors, like the small Paradigms, it's pretty easy to push enough power through the Rotel to cause it to clip.
Do you notice the crackle all the time, or only when you turn it up a little and during the program peaks?
Do you notice the crackle all the time, or only when you turn it up a little and during the program peaks?