Yea, that makes sense for an amp Jerry, but the power cord change was for the cd player. The vintage Marantz 1060 integrated has a captive power cord.
Interesting Power Cable Experience
I moved some items around in my office today and one of the items was a small Vizio tv and I noticed an aftermarket power cord was attached. It was a Dedicated Audio PDS1, 1.5m, 14ga. that I purchased in 2001. I removed and replaced it with a standard one as I now needed a more flexible one for the new spot the tv needed to be. During the process of deciding what to do with the extra cord, I remembered the Primare D20 cd player in my garage/shop. That along with a Pioneer RT-707 and a rebuilt/capped Marantz 1060 completes the system. I replaced the original, factory cord with the DA one and fired it up. Now, my standard settings for the Marantz is: all neutral tone control settings, all filters off, loudness off.
Holy crap, tons of bass Batman! Could not believe the difference, too much bass! So, I engaged the low filter, engaged the loudness, midrange up one click and the treble up 2 clicks. I have used aftermarket cords on all my gear since the late eighties, when I was in the business and never heard such a difference before. I was very surprised.