There is no sound difference from power cords other than what you imagine you are hearing. Signal cords yes due to capacitance. Power conditioners help isolate noise but most pwer supplies do that anyway.
Invest your money on better amps or speakers or DACs. Buy a good quality 12 AWG IEC power cord from Amazon for $12.
Invest your money on better amps or speakers or DACs. Buy a good quality 12 AWG IEC power cord from Amazon for $12.