Are manufacturer AC cables good enough?

"subjected to proper testing at UL" LOL!!!

Yes they are good enough, but good enough is not enough for geeks and tweakers-the chosen ones.

I have aftermarket power cables on some gear, but not all. I honestly don't know if there is a sonic difference, but it helps me sleep better at night.

Why not read their warranty and give us your legal opinion?💋💋 

It's a pretty standard warranty they gave themselves enough wiggle room.

To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul Klipsch 1953