dedicated power line for audio equipment

Whatever wire guage you use, as long as you have any say in it, don't let them staple the wire to the 2x4's inside the walls - the usual consrtuction practice and not a very sound-friendly thing to do. Work out some other solution that neither uses ferrous metal fasteners nor pinches the wiring when secured to the framing. The physical pinching can lead to a somewhat narrower audio bandwidth - easily avoided when having your home built, but to be sure you will probably have to be physically present to keep the workers from doing things the way they're used to.

First get a electrician who is good with commercial installations. Pull a 100 amp feed and wire it to a Square D commercial panel with a on and off capability (switch or breaker), make sure it has enough circuits (one for each component). Make sure you balance the load between components, which a good electrician should know. Use a 1 inch conduit from panel to receptacle for each dedicated line to each component. From here you can experiment with different wiring techniques, different receptacles, etc. (most important part of the installation).

Like different components in an audio system, so is the difference in electrical components and set up behind your wall, everything makes a difference, and it starts with your electrical.

So if this is the first step one must do to build a stereo or home theater system, unfortunately its only step one of..... At least you started on the right foot, something I and probably everybody else hasn't.

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thanks for the kind replies. I looked into some of the cryo treated wire. That may be a little bit out of my price range. I will probably end up going with 3 - 20amp lines using 10/2 romex. One line for each of my monoblocks and one line for my components that will be plugged into a power conditioner.

Rjtandiamonds and Thf99,
You're right. I had 20-amps for the house with a dedicated line for my system. I just installed 32 amps for the house and this is a huge upgrade for the SQ in my system -- unexpected.