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
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.
   
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