Originally Posted by A9X-308
My company buys tens to hundreds of millions in cable per year. ... When asked about the purity they all said '4 nines' or 99.99% pure. ....
You will note that I said he could go down to the hardware store and buy ZIP cord.
There are increasing levels of purity. But assuming that the wire is decent to start with the increase levels of purity are in the fractions. Though no more than an illustration to make my point, one grade might be 99%, the next grade up would be 99.9%, and the grade higher than that might be 99.99%. Though again that's just an illustration. I have seen the actual number recently, but they escape my mind at the moment.
However common OFC Speaker Wire is not that expensive, as I clearly illustrated. I was at Home Depot, and their house brand CE TECH was about $16 for 50 feet of 14ga. At about $0.32/foot, that is actually more than many others, but you can buy it in the store and walk out with it.
I don't think wire and cable will make a difference for most people as long as it is of a reasonable minimum standard and appropriate to the task.
While many reject the idea, I'm of the school that scales wire and cable up or down as a percentage of the system cost. Typically in the 3% to 5% range. Though that is just for budgeting, for anticipating the cost. When it comes time to actually buy, spend more or less as you see fit.
There is some benefit to the cosmetics of a cable, but bounds of reason
, speaker cables can get LITERALLY CRAZY expensive. Crazy expensive as in many hundreds if not many thousands of dollars. That really is crazy. But down on a more reasonably end of the scale, people are allowed to make aesthetic considerations.