Dedicated Electrical

Hey Guys,


When building a dedicated electrical circuits is it better to add to my current box or add a sub panel?  Pro's and con's?


Current plan is 10/2 w/ Shunyata outlets.


Thank you



Muliple lines runs the risk of ground loops. Even if this is avoided every wire is an antenna bringing RFI into the system. So one single dedicated line is the way to go.

@millercarbon is that the reason that a couple of my components were manufactured with only two wire power cords (meaning no ground)? My Maranzt SA10 does not have the ground, nor does an old M&K subwoofer I am still using. Long ago a manufacturer (that I won’t name) suggest "floating the ground" with a 3-to-2-blade adapter to try to get rid of hum; I am not at all planning on doing that, but would that theoretically be a solution to RFI?

(And I should note that I presently do NOT have hum. And I am NOT "floating the grounds.")

Another question: is that what power conditioners theoretically do? Remove RFI?

Last question: in the room my system is now in, I put three dedicated lines in (my mindset was that I would not only be isolating them from everything else in the house, but from each other--at the time not understanding how the neutral bar in the electrical panel functions), so from what I am getting from this is that I should turn two of the three circuit breakers ’OFF’ and just use one of the three outlets?

Single "home run" Romex from breaker box to dedicated listening room.

No hum, no buzz, no drama.

I agree @millercarbon. Perhaps consider using MCC (metal case cable) if you have the opportunity to run a new (dedicated) circuit for your front end.

I always do but I’m an anal audiophile lol.

Though a bit more expensive…the metal casing (if properly grounded) will help reject/shield the wire from the RFI/EMI that looms around any space with electronic components and/or walls loaded with romex.

Think of it as the metal box most of your stereo gear is built in…once grounded it’s called a “shielded ground”

Perhaps called a “faraday shield” or  “faraday cage” lol 

Most audiophiles like to see the tubes on top of the case (exposed) and so do I,

but they can also pick up RFI/EMI. It’s why most vintage gear didn’t expose the tubes… not just because there were no transistors at the time (and the tubes where fragile).

Ill never forget after my first 300b SET build, only the tubes where exposed on top.

I was sitting there on the second night, proudly listening (pretty loud) when my cell phone rang through the loudspeakers! Lololololol

Admittedly it never happened since then though. All my other tube gear is shielded (no exposed tubes) except for the Supratek pre…



That's right. All wires pick up RFI. Just what they do. Look- what's an antenna? Nothing more than a piece of wire. The wire is cut to length and laid in shapes or patterns to maximize particular frequencies of interest, but basically it is just a wire.

Radio frequencies are everywhere. We get our power from wires. Therefore, all of us have RFI. All we can do is take steps to minimize its impact.

A simple test, turn off as many breakers as you can, and you will hear the impact of reduced RFI. It will sound like you just put your system on battery power. Which I know what that sounds like from modifying things from wall AC to battery DC.

Experience gained with hands-on testing such as this is how I know a sub panel is sure to add unnecessary expense and noise, and the same goes for multiple lines.

immathewj- Your old vintage components are made that way because that’s the way pretty much everything was made back then. That’s the way the US electrical grid was designed to be run. Over the years though people get less and less educated, more and more heavily regulated, until today we are afraid of our own shadow. Redundant earth ground is now code in most places, and some are starting to add an even more redundant third ground to plumbing. When we see people attaching copper ground wires to plastic pipes we will know we are at Spinal Tap 11.

Eliminating, cutting, or "floating" the redundant third earth ground is one way of solving ground loop hum problems. In your case, with older gear with just two prong AC you already are "floating" the ground.

Power conditioners, almost all of them, primarily use a large transformer. These transformers are designed to be very efficient at 6oHz. AC is 60Hz. Ever notice makers of tube amps and other things like to brag about their custom wound transformers with great top end frequency response? Because it is hard to make a transformer do high frequency. Radio frequency is in mHz- mega. Not kilo, mega. So AC coming into the primary is chock full of RFI, but the AC coming out the secondary has a lot less. This is pretty much a power conditioner in a nutshell.

There is no "isolated" with running lines. Everything plugged into the outlet is connected to everything everywhere else plugged into the grid. All you have to do is follow the wires back to the panel, remove the cover and have a look inside to see that this is the case. Everyone else’s home is wired just the same. All those wires connect to neutral, and they all go back to the incoming utility. Everything is connected to everything else.

The only true isolation is a battery disconnected from AC and housed along with the component in a shielded chassis. I have this with my Rens Heijnis modified Strain Gauge phono stage. It works pretty good.

See my simple test above. Turning off two of your circuits will disconnect those two hot leads, reducing by that much the length of wire collecting and funneling RFI into your system. To that degree it will help. You might even be able to hear it. I have done a similar test, turning off some breakers and then others, and there is a difference. The more the better. Just remember to turn them back on. People get so cranky when the hot water runs out.