Isolation Transformer and Subpanel recommendations

End result is better quality power to my system; the dedicated circuit, rebalancing the house panel to make the dedicated circuit the first one off the main, all other high current circuits on the other leg/phase of the house panel, good quality wiring from the main panel to the room, cryo'ed Oyaide R1 outlets, etc... has taken me a certain amount of the distance but I'd like to separate from the house panel totally and improve the quality of power to the room even further.

individual copper runs pulled means individual insulated strands pulled through the flex conduit for positive, negative and neutral (ground)...

The run to the audio room would still need to be 100' as moving the panel to the garage would be a minimal change as the laundry room where the house panel is today is right next door to the garage; I might be able to save 10' or so but the difference is small by moving the panel. (The electrical main to the house itself is also right outside the garage and only about 20-25 feet from the existing house panel location.

Do you have your system posted? I'd like to see/know what you have going for power as you clearly have alot of experience in this area.

Thanks!

I would run a couple of dedicated 20A lines to the listening room, plug in a couple of Torus or Equi=Tech balanced power units and be done with it. I run my main system off a single 20A line, feeding three balanced isolation transformers mounted in a single large chassis, which sits near the bottom of my equipment rack. Each transformer feeds its own Oyaide R-1 duplex outlet. It is like having each component on its own dedicated line. Simple and uncomplicated, yet effective. I've been running this kind of setup for 8+ years now.

Gbart....thank you very much! If memory services the Torus units have their own isolation transformers built into them so this would accomplish more than one goal at the same time. Equitech also makes a high grade all in one panel that has an isolation transformer, EMI/RFI filtering and an isolation transformer all in the same unit; don't know what this costs but it seems like there are several ways to accomplish all this that people have utilized with great success.

BTW...in talking with an audiophile who knows a hell of a lot more than I do on this, it became clear that some of my responses and my not being an electrician have caused confusion on the thread. Apologies all around for this...
Thanks to all of you who tried to help. I've pieced together (with Arnie's help) the essential points I should be chasing if I make this modification and definitely appreciate the help!

End result is better quality power to my system; the dedicated circuit, rebalancing the house panel to make the dedicated circuit the first one off the main, all other high current circuits on the other leg/phase of the house panel, good quality wiring from the main panel to the room,

all other high current circuits on the other leg/phase of the house panel,

Sometimes that can be a bad idea. Doing so can put a strain on the secondary of the utility company's power transformer. It can also put stress on the busing and breaker connecting bus ties of the main service electrical panel.

In most residential housings areas the utility power transformer is a single phase xfmr.

The single phase secondary winding is center tapped in the middle of the winding. Thus the term split phase winding.

From the xfmr secondary to your house there are 3 power conductors.
The two hot insulated conductors connect to the outer most 240V leads of the xfmr secondary winding and the center tap conductor, the intentionally Grounded Conductor, the neutral.

To cut to the chase....

NEC code requires, as well as electricians are taught, to balance out the loads across the Lines, legs, of an electrical panel as much as possible.
Example the electrician would never put the microwave, dish washer, washing machine, sump pump, known deep freezer outlet, and the gas furnace blower motor all on the same Line, leg, in the panel.

Here is how a single phase, split phase transformer works.

Theoretically, if exactly 10 amps of load is connected across line one, L1, to neutral and exactly 10 amps of load is connected across L2 and neutral, zero amps will return on the neutral conductor back to the utility xfmr.
Only the unbalanced load will return on the neutral conductor......

The two 10 amp loads are in series with one another....
The two exactly equal 10 amp series load are actually being fed by the hot 240V legs of the panel.

Any unbalanced load will return on the neutral conductor to the source, the xfmr.

Example.

Say there are 30 amps of total connected load across L1 and neutral and only 5 amps of total connected load across L2 and neutral.

25 amps will return on the neutral conductor. The remaining 5 amps of L1 will be in series with the 5 amps of L2.... Is the balanced series load dirty or clean?
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If the main panel is evenly balanced within reason and a 5 Kva iso xfmr is connected across L1 and L2, fed 240V single phase balanced power then everybody is happy. Especially the utility power transformer.

What a good iso xfrm will give you is a new separately derived grounded AC power system. The wiring method used for the installation of the xfmr, the new electrical panel, and grounding will greatly determine its power quality performance.



http://openbookproject.net/electricCircuits/AC/AC_10.html#xtocid71230