You answered your own question. I've been using a 10' power cord for one of my subs for 10 years, no problem.
Ok, is it a standard cable or the multistranded style like Danny sells?
The cable that comes with the amp will be too short. I will have to use a extension cable to the outlet. So I wanted it to be one cable, and I wanted to try out Danny's solution.
I know I could build or buy an AC Power cable 10' long and use large gauge wire and sheilding and fancy terminals.
Hobbsmeerkat said "10' is too long and will over filter the power, reducing dynamics, so the max is 8', with the optimal being 5-6' " That is refering to Danny's multistranded cable.
Danny said "If by plate amp you mean a sub woofer plate amp then the additional filtering of a long cable won't be a problem." That is refering to Danny's multistranded cable.
So if Danny's cables are more for sorces, maybe I will wait to get one when I get a new sorce or preamp. My DAC is my sorce/volume control for now sporting a +12 volt supply with an expensive DIY cable.
But for the sub I will need a long AC cable.
When the time comes I will call and talk to Danny first then pull trigger on what ever I decide to do.
Thanks to all

Wayne in Oregon