Do you diy David? If so, try to make up some safe(!) powercords from +/-12awg solid core. About timimg, a well known trick in my area is to test the powercords polarity vs other components powercord, this can be heard specially in 3d and bass-timing. (50-60hz ac..)
Powercords should never be plugged into an extensoin-cable but directly into the wall. If not possible then make up an extension from solid core, like this:
https://www.ebay.com/itm/ComTran-34888-14-2C-Solid-Shielded-Plenum-Fire-Alarm-Cable-Red-FPLP-CL3P-10...
Powercords should never be plugged into an extensoin-cable but directly into the wall. If not possible then make up an extension from solid core, like this:
https://www.ebay.com/itm/ComTran-34888-14-2C-Solid-Shielded-Plenum-Fire-Alarm-Cable-Red-FPLP-CL3P-10...