I have done what you are proposing. I ran 3 ten gauge copper legs off a panel box using 3 panel slots each with a 20 amp square D breakers. and the panel box had a whole home surge protector. At the terminal end I used hospital grade 4 outlet receptables on the left and right and a center 2 outlet box. The only thing I ran thru the center was my power amp, with an a tripplite surge protector between .the wall and the power amp
The left and right outlets with 4 inputs accommodated all my other gear, phono pre-amp , two active sub woofers , turntable,, TV,, CD player, router, lamp, blue ray disc player, record cleaner etcetera
I was amazed at the difference the current to the power amp made.
TV s and power amps will have the greatest draw.