Dedicated 20 amp lines/should i use a sub panel


Happy New Year to all!!

I am about to install 3 - 20 amp dedicated lines for my stereo. I still have space in my 200 amp main panel but was wondering if their is any benefit to installing a 60 amp sub panel for the 3 audio circuits , also as i am using 10 gauge wire and its not the easiest to manipulate should i hook up the bare wire to the receptacles looped around the screws or inserted in the holes or should i use spade connection's. any advice would be appreciated.

Thanks in advance
Chris 
spinner1
Post removed 
Jim,
Thanks. Correct - that’s how I received it from the seller. Not sure if Stu R. originally did that or if it was the seller. As the REL is fine and grounded, the hum loop may be from the monos. I dunno. The Croft preamp has the safety ground intact as factory supplied. The 401 is also grounded. Interesting notes on the steel plate. However, I’ll definitely try it on the DIY 4 duplex receptacle unit if I can buy one in that size. Thanks for your help and apologies to the OP for going a little off-topic.
Thanks everyone, i appreciate the info. i guess ill forget about the sub panel as it seems like there is little to no benefit by adding it since the 3 runs will all be under 50 feet and i'm not going with an Equi=Tech as much as i would love too.
noromance,
No apology necessary, i'm enjoying all the different opinion's and just absorbing all the info.
   
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 !!