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Dedicated 20 amp circuit - Electrician laughed!

I brought my electrician out to my house today to show him where I would like to install a dedicated 20a circuit for my system.  He laughed and said that's the stupidest thing he's heard and laughs when people talk about it.  It said, if you're going to do it, you have to have it separately grounded (shoving a new 8 foot rod into the ground) but even then, he sees no way there can be an audible improvement.

Now, he's not just an electrician though. He rebuilds tube amps on the side and tears apart amps and such all the time so he's quite well versed in audio electronics and how they operate.

He basically said anyone who thinks they hear a difference is fooling themselves.  

Personally, I'm still not sure, I'm no engineer, my room's not perfect, and I can't spend hours on end critical listening...  But, he does kinda pull me farther to the "snake oil" side and the "suggestive hearing" side (aka, you hear an improvement because you want to hear it).

I'm not taking a side here but I thought it was interesting how definitive he was that this not only WILL not make a difference but ALMOST CANNOT make a difference. 
dtximages
fruitloopsr
80 posts
 
Is there a difference using 30 amp breakers instead of 20 or just overkill 
Does it matter either way
Thanks
Post removed 
cleeds
6,250 posts
 
fruitloopsr
Is there a difference using 30 amp breakers instead of 20 or just overkill
Does it matter either way
Yes, there’s a difference. Check NEC and your local code. NEC says you can’t use a 30A breaker on a 20A receptacle.
fruitloopsr
80 posts
 
Did not know they had 30 amp receptacles i used them before the breakers i mean.Just thought it would let more current through?Not a electrician but know how to wire up stuff
mitch2
4,315 posts
 
Most here that make upgrades use 20A circuits and 10awg wire (that is rated for 30A).
Whether one 20A circuit is enough may depend on the system.  Front end stuff doesn't use many amps, but some large amplifiers do when they are run hard.  The designer of my amplifiers has told me that by giving each monoblock its own 20A circuit I do not need to worry about any sonic deficiencies due to power limitations . 
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