Upgrade amp power cable or not?


I just got two Monster HTS2000. Do I still need to upgrade the power cable for my amp? I have a Unison Research Unico Hybrid amp. What does a high quality power cable do that a stock pc can't. I can never understand the importance of the pc. If the wire in the walls are only as good as home depot cable how can a high end pc help? Does it improve current? Or does it reduse power line noise? Please help me justify a pc upgrade or not. Thanks.
loki7177
Actually I have owned four Monster Conditioners. It is OK for connecting a receiver, VCR, and basic TV (which is where my remaining ones are), but it is still a cheap piece of plastic. Just remember the reverse. Many of those that don't believe in a good power conditioner, don't own one, and therefore have not or cannot compare a cheap conditioner with a good one, and with just plugging into the wall.

Some are blessed with a good clean power source, and some higher cost gear actually has a built-up power supply with some conditioning techniques built in. I'll hear from some that say conditioning does not work, and they list their gear which includes components with their own built in conditioning. So it does work and they don't know it.

I know from years of testing in my home the value of a good conditioner, good cables, and clean electric power. They all have their place. Unless you have dedicated lines, plugging into the wall is in many cases not the best answer, especially for those in apartments.
That brings to my mind another question - how do I go about testing my AC to ascertain how clean it is? Are there standard testing devices (hopefully, cheap ones...) to easily find out?

Also, how do I find out if my equipment has some level of power conditioning in the power supply? I have a Plinius 8200 MK1 integrated.

Thanks in advance for any responses.

Tim
I found that in my system, the sound improved when I did away with the all power conditioning and just ran my newly purchased Pure Note Sigma Power cords (www.purenote.com) directly from my Krell amps (or anything else) directly into my dedicated audiograde outlets.

Richard
The better conditioners are not filters that restrict power. They operate parallel to the circuit, so the power still flows.

Audio Prism makes a device called the "Noise Sniffer" that basically "plays" the noise in your lines though a speaker on the unit, so you can hear any noise.
I use a DIY powercord with my Unico. I find that it sounds smoother and has more precise imaging than the stock cord supplied with the Unico. It consists of Belden 19364 14/3 SJT wire with Marinco plugs. The shield is connected to ground at the wall plug end only. Very inexpensive to make.