HUM X does help but for my system it was renamed HUM-(minus) because while there was a perceptible diminishing of hum it wasn't gone, The improvement was well worth the $50 bucks I paid. For what its worth a solid clay brick on top of the transformer cage cooled the hum too but since hum is vibration I noticed additional clarity in playback overall. The Mad Scientists Tube toppers helped also. 3 pair on top of the three sets of preamp tubes. More resolution as well. By passed the Furman power stripe which cleared the tunes a little and also took out a trance amount of hum. Hum is a remarkably resilient little demon. Plus, my room is so quiet that an ant walking behind my sub causes a quavering in the treble.
Intermittent low hum/buzz
I know this has been covered here on these forums before but I gotta throw it out there one more time . So heres the set up , a dedicated 20 amp circuit on a full space breaker (not a split) so no shared neutral ,number 12 romex into a plastic box which I never use but I figured it would be best for what Im doing here then finally a hospital grade Isolated ground receptacle.All the cables both AC and signal are all either AQ, Kimber or Acustic Zen ,power conditioner is Torus model 15, power amp Prima Luna evo 400 ,pre amp Prima Luna evo 200 ,sources Aurender A100 ,anolog is Gold note phono pre and Planar 6 turntable with a moving coil cart.So that all seems pretty legit to me so why in the hell do I have this intermittent low level hum or really maybe more of a buzz In the mid range driver? ,oh speakers are Focal Kanta 2,s You have to put your ear right up to the speakers to here it but it’s driving me crazy ,Thanks in advance.