I agree with most everything I have read here, but I have to state that the wiring and circuits were not badly damaged. I saw the old wiring and there was a little greenness to the end of the wire connected to the breaker and everything worked fine, it just would pop the breaker in the panel if I got close to 15A which a 2150 watt system can do (amps only). Now the system has good connections, new breakers and I was startled when I could clearly hear a difference. It was startling because my expectations were the same as what has been expressed in this thread. I never would have dreamed that I would hear a benefit from this change to the system. I just can't explain it.

PS. I don't use $500.00 power cords either.