Hi Chasmo
I had a somewhat similar problem. This sometimes happens when the AC power line is not 100% grounded tho that wasnt my issue. When the AC is not 100% grounded, your speakers will probably pick up the 50/60hz AC frequency which you are hearing as a humm. My problem got solved by using a balanced interconnect between my pre and power (everything else is single ended) - dont recall if the Forte 5 has a balanced option. I also inserted a transformer based power conditioner which helped make the background quieter.
Best regards
JB
I had a somewhat similar problem. This sometimes happens when the AC power line is not 100% grounded tho that wasnt my issue. When the AC is not 100% grounded, your speakers will probably pick up the 50/60hz AC frequency which you are hearing as a humm. My problem got solved by using a balanced interconnect between my pre and power (everything else is single ended) - dont recall if the Forte 5 has a balanced option. I also inserted a transformer based power conditioner which helped make the background quieter.
Best regards
JB