power cables? What can I expect?

You may be able to go one better ... if so inclined. If you have the skills, run a new dedicated circuit for your audio system. Stop sharing power with the vacuum cleaner, noisey dimmers or (heaven forbid) a computer with laser printer! If you can do it yourself, less than fifty bucks will make a bigger improvement than a box full of kilobuck power cords.

The Absolute Power Cord's are a bargain. I have a couple I am not currently using, write me if you would to give them a try.

Jab,

I'm not sure that's globally true. I have two dedicated lines and different power cords make significant changes in my system. I heard less difference at the time when I moved from a non-dedicated line to a dedicated one (that is, with no power cord changes). I will say my system then was less evolved than it is today. I'm not saying there aren't very good reasons to move to a dedicated line...because I completely agree that there are.

Another area for improvement is a good A/C outlet.

-- Greg

I purchased a new Audio Refinement Complete Int amp in Sept and found that the cord that came with it was not well shielded and was causing interference with my tuner reception. I did not want to spend a lot on a cord and while I was tempted by the Absolute Power Cord, I am skeptical about some of their claims and I am not sure they offer a right of return. I ended up getting a Volex 14 gauge cord which is the same cord that Belden used to make. I think the model# is 17604 or something like that. If you search the forums here and on Audio Asylum, you will learn more. I bought two of them which I believe cost me around $40 including shipping. My radio interference went away. I did not get a night and day improvement in sound, but it certainly did no harm. I have gotten more benefits from changing speaker cables and interconnects. I am not sure what type of improvement you are trying to achieve, but I will offer that the Audio Refinement would not be my first choice to drive revealing electrostatic speakers. It is very competitive with solid state amps up to and beyond it's price range but it does not have the characteristics of good tube amps. I am using it with far less revealing and demanding speakers than yours (B&W DM602s2) and it works fine, particularly for backround music which is its primary role. I also have a young child and cannot devote as much time and effort to audio as a hobby anymore.