Just because something is expensive, it doesn't make it good. There's loads of new overpriced brands popping up which are simply white van junk.
As for audio cables, I run a recording studio with 96 analogue channels at mixdown. Cables often get stood on, pulled, or run over by the castor wheels of a swivel chair. They also run alongside mains and data cables so shielding is a must. It's a no brainer to buy industry standard double shielded Van Damme cable and Neutrik jacks for a solid connection, avoid crosstalk and be durable enough to withstand heavy studio usage. I certainly wouldn't dream of hooking up the audio element of my studio with bell wire!
That said, there are some companies (like the manufacturer of the dodgy subwoofer in the OP) who thrive on selling cheap junk at high prices to gullible folk. Overpriced power cables is a common one.