Richard Harnwell
Established Member
The sub in my 5.1 Focal Dome system has recently started to hum, even when not connected to a receiver (not even a lead plugged in). It increases with the volume knob.
I’ve tried different mains leads but no difference (I notice it has no earth/ground. I’ve tried it via other mains sockets and no change.
If I touch the outside of the RCA socket it mostly goes away. If I additionally touch the body of the sub, it completely goes away. Can anyone suggest what this signifies, and how I might fix it?
I’ve tried different mains leads but no difference (I notice it has no earth/ground. I’ve tried it via other mains sockets and no change.
If I touch the outside of the RCA socket it mostly goes away. If I additionally touch the body of the sub, it completely goes away. Can anyone suggest what this signifies, and how I might fix it?