Ngjockey asks the exact question I would ask.
It's possible your electrician delivered two phases to your system and you now have a ground loop.
If you can, plug everything into one outlet and see if the problem is resolved. If your power draw is too large or you don't have an extension box that allows space for all your cords, you might use a VOM and test the voltages on each outlet.
Typically the two phases are not the same voltage and you can figure out which phase is going to which outlet by reading it. Of course very long distances between the box and outlets (such at to opposite side of the home and upstairs) can drop voltage too, but within a similar distance the voltage coming off the transformer is usually much greater than distance drop.
Once you determine which outlets are the same phase, plug all your stereo gear in and see if the problem is resolved. If this fixes it, the electrician can swap the wires of your stereo dedicated run at the breaker box for the next breaker "down" to get all on the same phase.
I have 14 dedicated runs for just my stereo system and all of them with the exception of the TV and digital are on the same phase.
It's possible your electrician delivered two phases to your system and you now have a ground loop.
If you can, plug everything into one outlet and see if the problem is resolved. If your power draw is too large or you don't have an extension box that allows space for all your cords, you might use a VOM and test the voltages on each outlet.
Typically the two phases are not the same voltage and you can figure out which phase is going to which outlet by reading it. Of course very long distances between the box and outlets (such at to opposite side of the home and upstairs) can drop voltage too, but within a similar distance the voltage coming off the transformer is usually much greater than distance drop.
Once you determine which outlets are the same phase, plug all your stereo gear in and see if the problem is resolved. If this fixes it, the electrician can swap the wires of your stereo dedicated run at the breaker box for the next breaker "down" to get all on the same phase.
I have 14 dedicated runs for just my stereo system and all of them with the exception of the TV and digital are on the same phase.