Monster Cable MP HTS800 Home Theater PowerCenter for $29.99

The fact is, analog audio equipment is sensitive to a different type of noise than video, just as video is sensitive to a different type of noise than digital, and so on. In the past, manufacturers have used filters to combat the problem of noise introduced via power sources. Unfortunately, the filters were not optimized to attenuate at the different frequencies that are unique to digital, analog audio, and video realms.