How many dedicated lines?

As Bob (above) suggests, wire really is directional soundwise. I put in a sub-main and then ran four dedicated lines from the sub-main to four Hubbell duplex outlets.

Well the 60 ft. of stranded 6 ga. wire from the main to the sub-main was definitely directional. When run one direction, music was very soft and uninvolving, but when I reversed the wire and listened, music was much more live, dynamic and natural (BTW, I did this testing with this large wire out of the wall, ie before final installation).

I learned of this from Redkiwi, and just had to try it out. I'm a believer. Yes, 6 ga. wire is overkill, but I already had it. I also put in a dedicated ground from the sub-main, but am having a problem with my amps humming-- still working on that. I think Docroc gives good advice there. Good luck. Craig

Liguy; I had my whole dedicated system installed by a licensed electrician from a reputable business here in Oregon, and they had no problem with grounding the sub-main box. I assume you're referring to my post? Craig.

Sean and Liguy; Thanks for the input re grounding. I've got a call into the electrical company that installed my system to clarify this grounding issue. Craig.

Just for the record: (1) My sub-main box is also grounded back to the main. (2) What Liguy calls an isolated ground is not isolated in my system, it is a secondary ground and is totally acceptable to Oregon electrical code.

Also, just for the heckuva it, I disconnected the secondary ground (the one from the submain) and it made no difference either musically or to amplifier hum-- this indicates to me me that the main (house) ground is good, and there is no safety issue involved.

I actually would not have needed to put in a sub-main ground, but it seemed like a good idea at the time, and was not expensive. In fact I got that ground info. from an Agon thread of long ago. Cheers. Craig