Companies don't include power cables because: specialization.
It really is that simple.
If you are using freebie rubber power cords then everything out there is such a big step up you cannot possibly go wrong. If you want better then buying a power cord is no different than any other component. Read the reviews, buy the one within your budget that sounds the best. Once again yes it really is that simple.
The hardest part will be to realize that not only is buying one the same as any other component, but the quality of the power cord matters just as much as the quality of the amp.
It really is that simple.
If you are using freebie rubber power cords then everything out there is such a big step up you cannot possibly go wrong. If you want better then buying a power cord is no different than any other component. Read the reviews, buy the one within your budget that sounds the best. Once again yes it really is that simple.
The hardest part will be to realize that not only is buying one the same as any other component, but the quality of the power cord matters just as much as the quality of the amp.