2. home-theater
  3. 1360967341

Do preamp processors produce a slight hum .

I have unhooked quite a few things from my audio rack but the last thing was a VCR/DVD recorder not being used. I run a Comcast cable thru a Panamax surge conditioner than thru a mondial magic box then to cable box than to a old 40 tube tv.I have noticed a slight hum if you stand very Very close to unit,the processor is a 15 year old acurus act3. I have never paid any attention to this before. The only thing I have hooked up is a 5 Channel
Rotel amp, and a blu ray also in the panamax next week I will be replacing the acurus with a rotel 1068 processor so I hope I will not have any problems. I suspect this is probably normal but would like some advice from someone more
Knowledgable. Slight hum is When all equipment is off in a very quiet room and wondering is this going to happen with the rotel. Thank you
wynnroulette

Showing 1 response by kr4

kr4's avatar
kr4
3,707 posts
 
First, it ain't a common feature of prepros but it is a common problem with cable boxes. These are often installed with improper grounds, i.e., remote from the main house ground resulting in a ground loop. Relocating the cable ground to the main ground is a common fix. You can test this by disconnecting the input to the cable box.

Otherwise, normal ground sleuthing is recommended.
More to discover