There's a guy on Audiogon who sells "magic pebbles" in little jars. I didn't commit the name of product to memory, because it was such a hoodoo load of horse crap, all I could do was ROTFL that people would purchase such nonsense.Well I know with subs the cone doesn’t matter all that much. I have a w7 that had a ripped edge going around the cone and some other holes in the middle where it attached to the dust cap. I just built it all back up with dryer sheets and glue and I put it side by side with another identical w7 and there was hardly any difference at all.
It’s weird, I actually slightly prefer the sound of the dryer sheet cone sub over the brand new w7. Maybe it has more distortion and my ears like it, idk. But I don’t think I could reliably pick which one was which in a blind AB test though.
It seems hearing is so inextricably linked to feelings that the interpretation of sound becomes a personal belief system. Whatever you want to hear, you can hear given the right confirmation bias.
They sell for like $99/pair of jars, and he has loads of reviews about how astonishing the pebbles made people's systems. 🤣
As for cables, nothing trumps Ohm's law. The best cables you can buy or make merely transmit the signal with as little loss/RFI/EMI as possible.
Capacitance and Inductance can also spoil a signal.
Any cable over $100/pair is a complete waste, unless it's some specialized cable designed for extremely long runs.