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
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Yeah, but are the tube amps he rebuilds hi-fi amps, or guitar/bass amps? If hi-fi, are they Heathkit/Eico/Dynaco, or are they high end designs? Being an electrician, even one who works on tube amps, does not necessarily mean he knows what to listen for in music reproduction. Ask him to describe his hi-fi system!
I've lived in houses where I was able to have a dedicated circuit and ones where I didn't. I now live in my retirement house, a detached patio home, and to install a dedicated circuit would be very costly, entailing a new panel box and more it's weird wiring involved, anyway I have never really heard any huge improvement from having dedicated circuits. Of course I'm only going by memory but if any significant or game changing difference involved dedicated circuits that would be something memorable. 
It depends on what else is sharing the same line as your system.You don't want anything on there that creates noise.I think your electrician friend would agree with that.A dedicated line would give you peace of mind in that regard anyway.
at least get audio circuits on opposite leg of refrigerator, heat pump, AC..anything with a motor. IF the wizard doesn’t understand that, fire him.