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.
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D’Addario IEC to NEMA Plug Power Cable - 10 feet
12AWG Conductors

MSRP: $49.00 - currently on sale at Sweetwater (pro audio shop) online for $23.32 (including tax, free shipping)
[I just purchased one for my class-D powered sub]

I checked out that Pine Tree Audio - Stealth 1000 with 10AWG looks interesting, $150 for 10 feet, but it is heavier gauge wire.


PS. I really do enjoy my SR Master Coupler X2, it’s not just millercarbon
Many of the cable manufacturers offer ready made AC cords in 12 and 14 gauge (the 12 gauge cords usually require a separate AC outlet plug).  You can search Amazon for these plugs.  Also Amazon has hospital grade 14 gauge power cords ranging in price from $20 to $30 dependent on the brand for 10 ft lengths (named brands like Tripp Lite or Volex at the higher end).  These come with much more robust plugs.
I've got 2 REL T/9i subs and I'm using 2m power cords by Viborg.  They're selling on Amazon from $45 for 2m.  When I need a longer cable I connect two together with an adapter.