Your wondering too much.
Try a quality longer power cord (like maybe a Shunyata) and compare it to your shorter "idea" extension cord hook up. Borrow the power cord from the Cable Company if you need to. But ,don't just use any after market power cord.
Personally, I would think running better wire from the Electric Company pole transformer to your audio equipment would be a huge improvement! Well we know most of that is impossible.
But, dedicated circuits help clean up some of the junk running around the House via the Romex.
Different power cords make different improvements, some seem to do nothing at all.
Again, as you improve the cable running to your equipment so will the sound.
You can try to cheapen that with your shorter cable / extension cable idea and all you will accomplish is a pinched hose senerio.
Try a quality longer power cord (like maybe a Shunyata) and compare it to your shorter "idea" extension cord hook up. Borrow the power cord from the Cable Company if you need to. But ,don't just use any after market power cord.
Personally, I would think running better wire from the Electric Company pole transformer to your audio equipment would be a huge improvement! Well we know most of that is impossible.
But, dedicated circuits help clean up some of the junk running around the House via the Romex.
Different power cords make different improvements, some seem to do nothing at all.
Again, as you improve the cable running to your equipment so will the sound.
You can try to cheapen that with your shorter cable / extension cable idea and all you will accomplish is a pinched hose senerio.