2. amps-preamps
  3. 1039441608

Hum Pre-Amp/DVD Player/Scaler

I have a hum problem that is driving me absolutely crazy. I think I have a ghost in the machine, really.
I have a Sunfire Cinema Grand amp connected to a Rogue pre-amp, connected to a Denon DVD player connected to a ROCK+ scaler. The hum appears only when the component cables (BetterCables) are connected to the scaler. I know it is not the ROCK because I get an even lounder hum with my iSCAN Plus. When I disconnect the cable, vola, the hum goes away. I have tried RF chokes, tin foil, sourcing all components from the same outlet, different audio and component cables, voodoo, and prayer. Nothing works. Maybe I need to call-in an exorcist!

Right now, I have to disconnect the audio cables from the DVD player to the preamp. Ultimately, I may have to send them to my Lexicon pre-amp and forego tube heaven. (BTW, the Rogue has a pass-through feature that allows me to send the Lexicon signal through it to the Sunfire amp.)

Any help would be greatly appreciated.
doug99

Showing 1 response by stmike

stmike
39 posts
 
I had the exact same problem, and I too thought the only way to get rid of the hum was to disconnect the audio between my DVD (Sony) and preamp (Rogue). I tried another preamp and had the same difficulty, and another DVD as well. Finally I narrowed the problem down to the power cord of my amplifier. By moving it around the hum would get louder, softer, and in a certain position against the wall it went away entirely, so I taped it there. No more hum. I hope this helps.
Mike
More to discover