"And why would it matter that the power cord be 12, 10, or 9 gauge when it is the last 6 feet to the amp with 30, 40, 50 feet or more of 14 gauge feeding the system outlet through connections of inexpensive outlets? As I said, dedicated lines should be the first step for a power upgrade." - Tls49
This gets back to the argument for why any power cord of higher quality that what's in the house wiring could ever make a real difference. I'm not saying that a smaller gauge power cord couldn't sound exactly the same as a larger gauge one, but if the only difference between the two power cords is the gauge it would be expected that the larger gauge one would at least be equal and have more potential than the smaller gauge power cord.
A water large water pipe has the potential for more water to flow through it, but if a smaller pipe has adequate capacity to carry all of the available water then having a larger pipe wouldn't result in a benefit, but would have more potential.
This gets back to the argument for why any power cord of higher quality that what's in the house wiring could ever make a real difference. I'm not saying that a smaller gauge power cord couldn't sound exactly the same as a larger gauge one, but if the only difference between the two power cords is the gauge it would be expected that the larger gauge one would at least be equal and have more potential than the smaller gauge power cord.
A water large water pipe has the potential for more water to flow through it, but if a smaller pipe has adequate capacity to carry all of the available water then having a larger pipe wouldn't result in a benefit, but would have more potential.