Have you ever changed non-detachable poewer cord?

Yes -- I used the Asylum pc kit from diycable.com/powerproducts.htm.

Ive posted on this before as a plug for the person who cuts the cords on my gear, not sure where you live, but he is in Berkeley CAL, and does the job for $50-$80 and does quality work to boot.

i just pig tailed the cord going out of my amps & pre & put on a male iec connector about 4 inches out .its great for moving my amps now,i dont have to move my whale power cords ,goodluck,

keep the captured cord, cut off the male plug and solder the stripped end onto your outlet. it may not sound any better, but your doing so would qualify you as a member of the "tweakers hall of fame." (unfortunately, without a home, since dale evans died and her estate was forced to sell all those stuffed triggers just to meet the tax payments on the "tweakers...." home. betcha' didn't know that roy and dale were inveterate audiophiles. picked up from their long association with gabby hayes.) -cfb