Actually, I have already tried making AC cords using Romex. It is not bad, after all, it is what is in your walls! I even remember a review from Peter Moncrief of IAR, where he used a four cross (two Romex cables in an X) to build an AC cable. I tried that as well. Also, Tube Research builds a 10 strand Romex AC cable with the large 20 amp IEC connector soldered in place for their GT 400 amps (I had that cable too). All of these are good, but I must confess I prefer the old Tiffany TPC 60 over all of these. And although the Tiffany is now discontinued, it is often for sale at $60.00. To go beyond, I also believe that many of today's more expensive power cords are better than the Tiffany. I don't want to ruin this post with a negative comment, so I would just add that each of you can experiment for yourself, especially considering the small expense involved. After all, if it works at all, it beats the stock cords and you have a backup in case you get a loner piece of gear you wish to test. Last comment, Romex is a brand name, (like Band Aid) there are many types of sheathed copper cables, and there are differences in the sound of each. This will make this somewhat more difficult to test. (Sorry to bring all this up).