Long power cable for subwoofer

After reading this article: https://positive-feedback.com/audio-discourse/subwoofers/,  I replaced the extension cord going to an short Signal Cable power cord I have going into my Martin-Logan BF210 sub with a Signal Cable "extension" cord I had.  Much like the reviewer found, the mids and highs improved with the bass.

Looks like you can buy their 15 ft 10 awg cable for a little over $200.
http://signalcable.com/magicpower.html 

You’ll be just fine with the Monoprice 14 gage, 15 foot power cord. I’m using that exact cable and length for one of my subs as well. It was like 10 bucks.

Build your own. 13AWG is probably heavy enough. I’ve used this wire and it punches well above its price.

https://www.madisoundspeakerstore.com/power-cables/supra-lorad-2.5-power-cable-by-the-foot/

For plugs these are very good for the money.

http://www.soniccraft.com/product_info.php/cardas-3455r-iec-p-2109

http://www.soniccraft.com/product_info.php/cardas-3455r-male-ac-p-2110

Hi dtximages: Patrick Cullen recommends these AC cords to use with SVS subwoofers  https://www.cullencable.com/red-series/   Great company to work with.

Thanks @yoby 

Honestly my mind was eased when others agreed there is no reason to go high end on a subwoofer power cable.  I mean the topic is somewhat debatable on any piece of equipment, but on a subwoofer, I can definitely see why it matters much less.  For now, I'm using 3 ft extension cords.