"Good power cables are essential. I'm just wondering if the expensive aftermarket cables make things "better" over the stock cable. Honestly, I'm not certain Atma-Sphere even supplies a cable with their equipment."
The reasons are fairly obvious. If a manufacturer included a $1000 power cord with an amp, 90% of the potential customers will say they already have a high end power cord and you're forcing them to buy something they don't need, or they just don't want it for some reason. There are thousands of cables in the marketplace. Does it make sense to force 1 particular cable on everyone? If you give the same cable to 5 different people, you will get 5 different opinions.