Dedicated 20 amp lines/should i use a sub panel

Audio Advisor has excellent Solid Copper gold plated 20 amp 
for $100 each , or their phosphor bronze gold plated 20 amp $50
night and day better then anything Hubble makes and the best buy
in top quality outlets  built to last and grips great. 
Look at the resistance index ,cheap home units zinc , brass ,
bronze 4x better conductivity , Copper 5 x .for the money 
the gold phosphor bronze  are fantastic . I am rebuilding my line 
conditioner with the exact one . You want great sounding cable inside your wall,
Analysis plus sells The best Audio cable by far that runs inside your wall a awg11 I believe you may pay 4 times as much as Home Depot crap but you will hear the diffference without question !!

Use levlok hospital grade outlets. They have pigtails and you connect it with wire nuts 

New house, ran 4 separate 20 amp circuits to 1 of the main panels. I asked my electrician and he thought that would be best. No hum or issues and have plenty of power for anything I want to use