Do I need a power cable - if so what brand?

I have an expensive conditioner [Tice Power Block] that was highly regarded in its time , sometimes it helped. I now have two dedicated lines and it makes thing worse. Lines are the way to go but may not be cheap. I have never been crazy about Monster products, I use to be a dealer for them; not that they are bad, but there are usually better products for less money. Even with dedicated lines cords still make a difference. I recently bought some of the Siltech cords being closed out and think they are a real bargain; $60 for 1 M , $90 for 2 M. If you are up for do it yourself then Stringreens suggestion would give you a really superior cord.

In my 45 years in audio I have heard arguments like Almarg's many times. Better quality resistors cannot make a difference. Why would you put good wiring inside a speaker? How can a dedicated line do any good if the current has already traveled miles over transmission lines? This is usually called the objectivist position, if you cannot give a good reason for what you hear then you can't be hearing it. It is , however, not to be confused with science; it is a philosophical position unless you can prove that there could not be a difference. When I hear a difference between any item of equipment I always keep in mind that I may be deluding myself but generally when I hear a difference there is a difference. If Almarg is right then dedicated lines are a waste of time.