Add a zero – That's the latest LessLoss Firewall 640X, a plug-in passive inline filter/conditioner for power cords. The new zero in the nomenclature reflects "coming ever closer to zero loss" whilst the price [$654 standard, $1'272 in C-MARC form] remains unchanged despite the extra zero. Inside the wooden box are potted modules for hot, return and ground which present as 20mm² of specialty copper each to cause zero current limitations. One ideal use for a single unit would be at the far end of the power cord feeding a power distributor to benefit all components at once.