When a power cord could obviously affect SQ

Why is it an obvious upgrade? If the existing cable can provide all the power you'll need what changes with higher priced cables ? 

BTW... Nice amps!

What are you trying to say about When a power cord could obviously affect SQ?

@lanx0003 Remember, I have been somewhat sceptical.  My thought was that the cathodes of tubes such as the 2A3 are  less isolated from EMI picked up by the cable, hence a greater chance of SQ being affected than with components sitting behind smoothed and voltage regulated power supplies.

@tuberist I looked up Ray tubes and they are now on my list, thanks.

  Congratulations on your new amps. Based on personal experience I believe cabling matters. Im sure the usual bricks will chime in that it makes no difference. It did for me and they are not me. Of all my cables, power cords had the least effect Vs IC’s and speaker cables. If your amps are coming with preferred cables you are a step ahead and I’d just run them. After some break in time ( yes I believe that too) , try something different. I think it’s all about trying it for ourselves and keeping an open mind. Funny power cord story to share. I have my front end all running into a Richard Gray power filter with mid tier cords. I replaced the filter cord ( 20 amp ) with a Shunyata Venom HP and was surprised at the level of improvement. Again I had to try for myself. Enjoy your gear , Mike B. 

If you have recommended power cords I would jump on them. 
 

I just bought a new DAC so I need an additional plug. I’m in the middle of figuring that out. I think all cords make a huge difference. I’m switching back and forth between Nordost Heimdall 2 and Frey 2. So far, the Frey is winning by a lot. But the cost…..

Enjoy your new amps!