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Power cords makes difference-Why?

I just discovered to my amazment that even power cords swap with the same high-end brand of equipment makes a difference. My story follows , I would like someone to shed more light on the phenomenon.( I know there exist power cords costing thousands, but never bought in to it.)Recently I added a surround sound preamp (Classe SSP-50) and multi channel amp(classe CAV-150)and center and surround speakers(Dunlavy SC-1 and SC-II'S). I have two channel system consisting of Classe CDP.5, Preamp CP-45,Amp CA-400 and Dunlavy SC V's as main speakers.The power cord on the SSP-50 has a little larger dia then the preamp CP-45. Last few weeks I thought I was using 'better' power cord with the CP-45. Everything else remained same for two channel(SSP-50 isolated) and the sound stage changed for worse.I was scraching my head frustrated thinking if any thing else I did could change my Audio nirvana. Then I recalled the powercord swap and quickly changed back to thier respective cords and wallah: My original sound was back.So my question: What constitutes a great power cord? Thanks for your advice in advance.
nilthepill
nilthepill OP
842 posts
 
Thanks to all of you for your inputs. The power plant I have heard ( and read)a lot about lately.I am referring to the PS300 and recent bigger models. What I can't decide is waht model to buy (try first). Does it have a greater effect on the front ends only or Does is also have to be for the amp? ( As my power requirements are very high for the amp, 800 w in 4 ohms for the Dunlavy V'S.) Should I buy the PS300 for the front ends first or buy their biggest model PS2000? for all? I have read mixed reviews on PS600, It seems PS300 somehow comes ahead.
tml2
234 posts
 
The first thing to do if you can afford it is run dedicated lines and put in quality hospital grade wall outlets.Once you have done this then you should move on to other power tweaks.This is generally the best bang for your buck.And usually has the biggest effect.
pls1
432 posts
 
I also have SC-V's which I dirve with high powered tube monoblocks. The three things that did the most were dedicated lines in balanced congiguration for the power amps. A edicated star ground. Dedicated lines in a balanced configuration to two PS-300's one for my digital input chan and one for my analog chain. I doubt that unless you have really awefull power or that you have both very high RFI and very susceptable amps that the high powered PS Audio Power Plants would improve your poweramps mor than dedicated lines and a good powercord.
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