I just calculated that if 10 amps of current runs through your house wire and if you place the speaker wire 1" away from the house wire, a current of 28 micro-amps will flow through your speaker wire. That's 3 nano-watts max flowing to your speaker. The Axioms are sensitive but not that sensitive :).
Now of course I could be wrong in my calculation because it's been sometime since I've had to apply Maxwell's equations.
Robb and the article is right in that it's good practice to keep audio/video cables separated from house wiring and I too was very anal about this when I built my basement. The real concern however is with small signals such as those found in subwoofer and component cables.
