One key thing about "listening" to changes brought on by inserting different power cords in a resolving system: when you first connect a power cord, the sound of the system will change over time, and it will change several times. The changes in sound can be subtle or more pronounced. This is the "break in" process. After trying many aftermarket power cords on different components over the years, this is my experience. If you're simply trying power cords for a few hours and then removing them, you will not hear the final sound of the system. Again, this is my experience. It may not be your experience. For me, the terms "settling in" and "breaking in" of cables exists. In my opinion, you cannot properly judge a power cord's affect until quite a few hours and days have occurred with that power cord connected. Or, you can run a new power cord connected to some other device (ie. refrigerator, computer, humidifier) before inserting it in your system to break it in. (also called "burn in.") Anymore, I typically don't have the patience for this and simply connect a new power cord to the component and play the system.