I purchase the Monster Cable Powerline 200 to replace the stock power cord that came with my 200 watt B&K amplifer. It did just that improving the image quality and cohesiveness of the sound. I found it to be a relatively inexpensive way to improve the overall sound of my amplifier. Ultimately, the Powerline 200 was replaced by a PS Audio power cord, which proved to make an even bigger improvement in sound, especially in the bass department. All in all, the Powerline 200 is a good product though and I think it is worth a try. I now use it on my surround sound receiver.