Mitch.I think that it involves running a main line upstream of your breaker panel.I didn't do this but changed the breakers and lines to the uppermost location and cleaned and pro-gold the tabs on the breaker.Don't know if it did much.May be a little.
What did make a difference was driving in a separate ground rod and then from the PS Audio power port plug I ran a separate ground wire from the dedicated ground lug on the plug to the new ground rod.
Result ......no noise ! I always thought that a dedicated outlet and all and a PS Audio 300 would have cleaned things up but with that isolated ground I often look at the equipment between tracks to make it is on cause it is
so quiet.
Hope this helps.
Peter
What did make a difference was driving in a separate ground rod and then from the PS Audio power port plug I ran a separate ground wire from the dedicated ground lug on the plug to the new ground rod.
Result ......no noise ! I always thought that a dedicated outlet and all and a PS Audio 300 would have cleaned things up but with that isolated ground I often look at the equipment between tracks to make it is on cause it is
so quiet.
Hope this helps.
Peter