Stranded vs Solid Copper

Thanks for your response.
Luckily the circuit is 5 outlets with one overhead light. I never turn on the overhead light and typically use one lamp. It would be nice to have a dedicated circuit, but I didn’t build the house.
What I’m asking if 12 gauge stranded wire has inferior sonic characteristics? It would make a more flexible cord. I’ll look into a better breaker.

The plastic box was buried in the wall so far that the electrician used 2 + inch screws to connect the receptacle to the plastic box. When I plugged my Silnote cord  into the receptacle it pushed the receptacle back into the wall and broke the plastic cover.
i could have mounted the metal box right over the existing box, but I thought this might afford me the chance to gain some flexibility and expand the number of outlets to two.

Thanks for the input... you've given me some new ideas. I'm going to mount an exterior metal box with a solid cover over the top of the existing outlet box. Then I'll run a piece solid cooper romex in conduit horizontally over to another surface mounted box with hospital grade receptacles that is directly behind my rack/entertainment center.
Then when it is time to move, (rental) I'll remove the exterior boxes (5 screws) and conduit and restore the crappy receptacle the was originally there.

djones51.. I’ve used small diameter copper tubing as a spacer in the past.. works great because you can custom make your lengths.
As for some of the other comments.. I’ve built a number of homes myself and have functioned as my own electrician under a friends license. Not particularly worried about burning the house down. Just trying to get a good solid connection for these new power cords I recently purchased.

Thanks for the very good suggestion. Looks like they have a product to hide the vertical tv cables.
thanks