Power cable for REL sub -- modestly priced


Does anyone have a suggestion for a longer cord for a REL 328 sub? It has a class D amp.
Before you suggest high dollar cords, please know that I'm not a skeptic, but am tapped out for power cords. And, for what it's worth, I had a Pangea AC9 1 meter power cord which I experimented with using my REL. Made zero difference. In fact, in an exchange with REL, they said this: "A while back, REL tested some third party power cords with our subs but did not find a noticeable impact."

So, my question is about a decently made but not pricey brand of extension cord for a REL sub. I'm not looking for Shunyata etc.  Any suggestions? Thanks.
128x128hilde45
Thanks, all. Here's the response from REL to my question, FYI:

REL: "Thank you for contacting us. You can use an extension cord with your REL subwoofer, though it is important that the extension cord is rated to handle the current draws requires by the subwoofer. The extension cord should at least match the specifications of the stock power cord that is provided with the subwoofer, and these specs are listed below:
- 3 conductor (including earth ground)
- 18 AWG wire
- 300V voltage rating
- 105°C temperature rating."

Tried different power cables but made no difference with my REL.

So when I needed something longer I just got a basic cable from Amazon. 
Have a pair of Rel S/812 I use Pangea 14 I believe on both units just because I have them did try PS audio AC —5 since I own them no difference although I do use 2 dedicated lines plus PS audio outlets & PS audio decket have not tried the originals that came with the unit Also own a couple of Zu audio Events PC Silver cables but have not tried them . Have heard good things about audio envy PC
@a_shah -- your post's style seems inspired by Gertrude Stein. Viz., "We are able to notice that each one in a way carried a bundle, they were not a trouble to them nor were they all bundles as some of them were chickens some of them pheasants some of them sheep and some of them bundles, they were not a trouble to them and then indeed we learned that it was the principal recreation and they were so arranged that they were not given away, and to-day they were given away."
I do have a pair of Rel S510 and other 
Rels in the past and cannot recall 
hearing any difference with upgraded 
power cords.
I think it has to with class d amplification.
 I am currently using Pangea power cords
with my Rels.