These started life in a small metal enclosure but to increase safety I moved them into a light grey ABS enclosure. A request came for a black one and with black leads. Here it is, all in black.
Over the years I have modified components used and construct to the point where these are quicker and easier to build for me but still offer the high level of safety and performance. They still have a ferrite choke on the socket lead, are fused, a high current diode bridge is used and the usual RFI/EMI power filter included. Of those sold everyone has reported improvements in system performance and a couple have also used them on their TVs for better picture clarity. They really are simple and effective.