audiphile power cords

Once in a while the stock power cord sounds pretty good and
various aftermarket cords can muck up the sound. It's
happened in my past systems. Some aftermarket power cords
can make very little difference. One problem is that you
can't try every power cord out there. The one that is best
in your system may be out of reach and too pricey, or
totally unknown. Sometimes aftermarket power cords can make
your system sound better. Some can add bass and weight to
the sound, and some take away bass. Some add bass weight and
reduce the highs (this seems typical) but the reverse can
happen too. There's no set answer for what can happen, but
power cords usually alter the sound for better or worse.
Sometimes I feel like I've expected a power cord to make too
big a change. I've learned this is folly. The component
makes the big difference. A good power cord I use is the 8+
by Triode Wire Labs. These come with a 30 day trial period.
If I were starting out in what I call the "power cord
jungle" I would only deal with power cords that have at
least a 30 day trial period, so I could make a return if
necessary. This removes your risk. In various systems over
the years I have owned power cords up to $950 used.

"Has any component manufacturer ever gotten on board with recommending any aftermarket power cords for their equipment?"

Mitch4t, one example: Joule Electra recommends Purist Audio Design power cords for their preamps. I contacted them and this was their preference and recommendation. Price of entry though can be steep. I had a used Ferox Dominus once.