Using 7 Kef Eggs and a Sub package, from a Denon amp, I've had two problems with unwanted noise from day 1 (only on the sub) - the hum I had was fixed with an earth cable from the amp earth point to a screwpoint on the sub back plate (thanks to Kef tech support), but I'm still getting other interference. This comes and goes through the day and night. The best description is it sounds like radio (mostly talking, bit of music). If I touch any of the positive speaker terminals on the sub (not in use as using a mono sub line-in) the interference increases dramatically. The negative terminals have no effect. If thesubisdisconnectedfrom everything else,theproblem remains the same. The power is all shielded, and amp and sub have been tried in the same mains outlet. Any ideas out there please - this is driving me mad?