Mickey,
The only way to keep the AC interference to a minimum is to use heavy-gauge, shielded cables. Standard speaker cables are usually not sheilded, but you can purchase heavy-gauge, sheilded, instrument cable at most of the better music stores. Then it's just a matter of soldering the 1/4-inch connectors at both ends and making sure the shield is grounded to the sleeve. The heavier gauge wire helps reduce the loss in signal strength, which essentially improves the signal to noise ratio. The shielding is icing on the cake.
For the AC line cable, always use the heaviest gauge wire possible--it really makes a big difference. And, in my case, I use a surge protector that has a ground-fault detector/indicator light built in. Most noise problems, especially 60 Hz hum, usually orriginates from poor or non-existant ground systems.
Cheers,
Gary
------------------
Travlin' Easy
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)