powercords

I can say that I upgraded my whole system in Nordost Frey2 power cables along with a QX4 and QBase8 and it has made a significant difference in my sound. No question. 
I started with stock, went to Red Dawn and then graduated to Frey2. I don’t understand the argument against improving the power cables. If you don’t want to spend the money that is one thing. But trying to convince anyone that better power cables don’t work is a real losing argument. The balance between improvement and cost is an individuals choice. They work!

My equipment is the following:

Paradigm 3F
Rega Planar8
Mcintosh MD 1100 phono preamp 
Simaudio 740 preamp
Simaudio 760 ampSimaudio 780D streamer/Dac
Nordost Frey2 interconnects
Nordost TYR2 speaker cable 

Hi,
powercords have influence on anything, from wall outlet to tt motor to poweramp.
Quality of material, length, gauge, plugs all play a significant role.
Negatives include longer breaking in time and as many things they do not come for free.

Many years ago (and I'm giving my age away here), before specialist power cords were widely available a cheap upgrade here in the UK, was to use a 13 amp kettle flex. Much better than the standard offering, provided you could cope with the standard 3ft length. I got hold of some brown ones which were a nice match to Meridian 101/105's.

In my main system, I do hear an improvement with good upgraded power cords however I hear much greater improvement on all my other components.