Hoping you all can help me solve a humming issue. I just had some built in cabinets with dimmable LED lights installed for my records\/TT. \nIn the new cabinets, I have a Project Debut Carbon TT hooked up to the phono input of a ‘70’s Marantz receiver with a pair of BJC RCA cables with a ground connector. I use the Marantz as a pre-amp running a set of monoprice RCA’s from the Tape Out to my Denon home theater receiver. The monoprice RCA’s exit the back of the cabinet to a 3\/4” inaccessible space between the wall and the back of the cabinet. From there they go down into a drywall covered box the cabinet sits on top of. The wiring for the lights comes up the same hole. The monoprice RCA is 50’ long (probably only need about 15’).\n\nWhen the phono input on the marantz is selected, I get a hum from my home theater speakers whenever I turn the cabinet light on. The hum goes away when I turn the Marantz to any other input (none of them are connected), or when I turn the lights off.\n\nI’m not sure if I should try to run a better and shorter interconnect? Or do the ground loop hum eliminators your see online work?\n\nAny thoughts would be appreciated.