Dedicated 20 amp lines/should i use a sub panel

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 !!

noromance said:

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.

The DIY 4 duplex plate appears to be stainless steel. It may or may not have ferrous materials in it. It depends on the grade quality of the stainless steel. You can use a magnet to check it. If the magnet sticks to the plate like glue or is attracted to the plate replace it with a non breakable nylon plate. Change that single receptacle steel cover plate if that is the outlet that’s feeds the DIY power distributor.

Jim