Power Supply Options - Pre Amp and Power Amp

I checked the markings in the electric panel. My living room has a dedicated 15A line for outlets and a separate 15A line for lights.

I guess I can unplug all other electronics (except modem) from the living room outlets to make it a temporary dedicated line when I play my hi-fi.

Are there any benefits of upgrading an outlet with a high-quality receptacle in the living room? Can you recommend some high-quality receptacles? I know Furutech has some offerings but I don't know about their price or where to get them. Thanks.

One thing about room outlets.. They almost always are wired from one to the next.
Sometimes the neutral wire is not cut, but is looped to inset a screw from the middle outlets.
The weakest point in the 'outlet to outlet' conenction is "IF" the duplex 'strap' connnecting the two halves of a duplex also are where the next outlet gets it's wire from.
So the wires is from panel to outlet #1 top, then the current has to flow down to the bottom half of the duplex through the little strap where the wire going to the next outlet #2 takes its power from.. etc.

A typical living room with five wall outlets (like my apartment) would thus have four of these complicated connections by the last outlet.

Sometimes this is complicated by the outlets being added in on the other side of the wall (in the next room)

So folks who ust want to add an aftermarket duplex to improve the AC service might want to check annd find out how the wires run through the room to the outlets and between them.
You may discover your choice outlet IS the #1 outlet.. or thee last in a series..

When I move into a place, I replace the outlets anyway,, and find out what outlets are on which breaker, and label them.. and how they are arranged.

It is possible to just run a wire around bypassing all the other outlets to get cleaner power to just your favorite outlet. (without a lot of tearing stuff up.)

Dedicated lines will make a surprising difference in alleviating noise and increasing dynamics. If your house is like most modern dwellings, it is likely that one 15 amp line services several wall outlets in your listening room (you can test by plugging in a noisy appliance like a hair dryer into the outlets and then shutting down breakers in your service box, to see what wires service which outlets).

If not handy then you will need to hire an electrician to install dedicated lines. Even though you have a stereo amp presently, you may want the electrician to install separate 20 amp lines for amplification of two mono amps to have them available should you upgrade someday - it will be cheaper to do this once and not have to call the electrician back to run another wire along the same route when the upgrade bug bites you. And also a dedicated 15 amp line for your pre-amp and source into a duplex box, with maybe an additional duplex outlet for additional sources like a turntable or computer audio.

If you don't want to do all that, something you may be able to do yourself is install new power outlets. When I installed a dedicated power line for my pre-amp and CD player to take them out of a ten-outlet chain (!), I changed out my stock outlet for a Furutech GTX outlet and found it did improve the sound a surprising amount beyond the initial improvement observed by putting in the dedicated line.