Designer in wall wiring - worth it?

@zlone,

AC Power Wiring Types: ''Two conductor plus 1 ground MC (Metal Clad) is a good choice for Non-Isolated Ground A/V systems. MC cable contains a safety grounding conductor (wire). The three conductors in the MC cable (Line, Neutral and Ground) are uniformly twisted, reducing both induced voltages on the ground wire and radiated AC magnetic fields. The NEC article 250.118 (10)a prohibits the use of this cable for isolated ground circuits because the metal jacket is not considered a grounding conductor, and it is not rated for fault current.'' Also the safety grounding conductor (wire) is insulated. See here pages 11-13

Mike

While you’re at it, check with the power company and get them to replace the wiring from wherever it’s generated to your house. 

The belief that the last few feet of wiring or a power cord can make any obective difference, is laughable.

@ditusa Thanks for the metal clad suggestion, I am guessing that works pretty well. Probably not a fit for my situation as these outlets are on an outside wall in an old house. Wiring them is a real trick involving angle drilling into the sill that is recessed on the foundation wall. It is why I used 12 awg on this set, I wired 10 awg on my previous room and it was really difficult to route. Metal clad would require compromising the sill I think. 

Audience in-wall shielded 10 gauge cable.

The cable IS NOT Listed for use as branch circuit power wiring.

NEC/ AHJ (Authority Having Jurisdiction) requires the branch circuit wiring shall be Listed by a recognized NRTL testing laboratory, example of an NRTL,  UL. 

NEC 110.2, 110.3 (C)

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I have two dedicated outlets for my system using standard 12 gauge with short runs of about 15’ to the breaker box.

Pretty short runs... Any chance of voltage drop is slim to none. 

Just curious, do you have any surge protection to protect your audio equipment? A Whole House Surge Protector at the electrical panel?

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Thanks for the comment. Both lines are on the same leg of my box,  

Best way to verify 100% is to check with a volt meter, multimeter.

If both dedicated branch circuits are fed from breakers on the same Line, leg.

Measure for voltage, from a hot contact of a duplex outlet, connected to one dedicated branch circuit, to a hot contact, on the other dedicated branch circuit duplex outlet. You should measure zero volts nominal.

IF you measure 240Vac nominal then the two branch circuits are not fed from the same Line, but rather are fed from Line 1 and Line 2. 

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@zlone 

While I have four Audience power cables and I use a Audience AR6 power conditioner, I have never tried their bulk power cable.

Sorry.