Are upgraded power cables for subwoofers worth it?

I would definitely not pay any attention to anything ASR says. Not a source of good information.

I have always wondered, but not enough to do the research. My biggest concern was interconnects. I just hedged my bets and got inexpensive subwoofer cables. Typically power cords on amps have made a very big difference. I got rid of the subwoofers from my audio system a few years ago. I still have a couple 800 series B&W in my home theater. So, I'd be interested in hearing from someone who has actually done comparisons. I would doubt it... but then I didn't thing interconnects, cables and power cords couldn't possibly make a difference and proved myself completely wrong by experimentation... so, maybe my intuition will be right this time.

If one believes power cables make a difference with the rest of their equipment why would they not believe they could make a difference with subs? PC's also affect dynamics both macro and micro. So, per everything in audio, believe what you want to believe, but don't you think it may be worth your time to at least test the hypothesis prior to making assumptions.

Power cords make a difference with my $400 Audioengine powered computer speakers, though I didn't hear a significant difference between $300 and $800 power cords, but both were vastly superior to stock. I can't really imagine that good power cords wouldn't make a positive difference with powered subwoofer, though this does not necessarily mean that it should be expensive exotic power cords.

Yes, better power cables on subwoofers absolutely make a difference.

kn

Whatever power cord you use, make sure the wire gauge is big enough for the current draw of the sub’s amplifier (12awg should be fine), the connectors make good contact and fit snugly in the duplex, and the cable is shielded to reduce noise (although not necessarily a requirement if you don’t have a noise issue).

You can get this done for as little as $100 or less, with something like this one, or even this one. Here is one that you could construct as a DIY project using a typical Hubble plug and IEC. You should be able to find that cable by the foot.