Are upgraded power cables for subwoofers worth it?

I use upgraded cables on all the subwoofers I set up and use.  The sub in my main system has a 400W class D amp.  It’s what I would call high end lifestyle gear, and is pretty good sounding.  It came stock with a consumer grade 18 gauge cord with a figure 8 connector. Because of the way the cord enters from the bottom, stiffer and larger gauge cables were not an immediate option.  After figuring out how to put the sub on spikes (which improved performance) I built a 14 gauge cable with Furutech parts.  With the new cable, the sub sounds better, cleaner, more defined, with improvements in overall soundstage.  It is possible that an even bigger gauge cable would be better, but I am satisfied for now, and my experience suggests that a sub with a class D amp can benefit from a better cable.

kn

This is what I wound up going with. Well reviewed, thick gauge. I’ve also heard people say their isolation feet for speakers are real good for the price. If these offer an audible benefit on my second system, this may behoove me to install higher end power cabling on my studio subwoofers and in that case I’ll probably look at more Cardas Parsec cables.

Tertullus HiFi Audiophile Power Cord with US Rhodium Plated Connector Plug+ IEC 320 C15 Female Connector Audio AC Power Cable 125V 15A for Speaker, Subwoofer, Turntable, AMP(3M / 9.89FT)… https://a.co/d/hvrktng

@knownothing thanks for your input. Makes me think these beefy chi-fi Amazon cables may be an improvement even if theyre not name brand audiophile cables

@jrareform Indeed, you may find relatively unknown cables to be real value, or perhaps not. The diy recipe I use today replaced much more expensive cables from well known manufacturers, depending on materials and length these cable cost between aprox. $350-$700. For anyone interested in diy these are Double Helix @williewonka design, many threads on Audiogon.

@jrareform that is a lovely looking cable.  It uses pretty ordinary copper hiwever which is why it is so cheap.  If you want good performing premade Chi-fi cable, go for cables that claim to use OCC copper.  Here are some examples I have used with very good results:

https://a.aliexpress.com/_mMgQlJz

https://a.aliexpress.com/_mrXNZNh

kn

@sns that looks like a solid option.  What do materials cost on those typically for you and how difficult are they to create? 

@knownothing good call on that.  I figure these were at least OFC but my shunyata stuff is all OCC which is definitely superior.  Was a little skeptical of chi fi stuff actually using OCC but if youve had good results with these I'll have to check them out!