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My Oppo hums

With my new Burson PI-160, my Oppo now hums at the speaker with the volume turned up and when still connected via ICs and on another input, passes the hum on (albeit slightly with nothing playing). There is no OFF feature on the Oppo, just standby. It was never present with the older Burson or the Classic 6.1 that I still have. If I disconnect the Oppo, the hum is gone. The mickey mouse IEC has no ground plug and that may be the problem: won't know until tomorrow when I get one with a ground plug (if they make one) Has anyone else experienced this?
128x128nonoise
jea48
4,416 posts
 
Does the Burson PI-160 use the equipment ground, third wire? If so you may have a ground loop problem.

If you have a CATV or SAT cable system and it is connected to the audio system in anyway then the hum could be ground loop related....

For a test disconnect the CATV or SAT coax cable from the system. Check for hum. No hum buy a CATV cable ground isolator. Jensen makes a good ground isolator.

The Jensen will not work on a SAT system.
nonoise's avatar
nonoise OP
10,825 posts
 
Summitav & Jea48:

Thanks! That seems to be the culprit. I disconnected the cable COAX from the cable box and 'viola!' the hum disappeared. On all inputs. Now I'm off to get that Jensen ground isolator.
You guys on A'gon are the best.
chadnliz
3,736 posts
 
Dont get the ground isolator until you have your cable/sat guy come out and fix earth ground, its their problem to fix. My cable co fixed mine for free last year.
Why spend your money if you can get it fixed for free?
nonoise's avatar
nonoise OP
10,825 posts
 
Not to worry. When I asked around for the Jensen unit, no one had it in stock. Jensen is about 15 minutes from where I live and they'd have to make it for me for about $59. I found a cheaper alternative for $3 at a local electronics store that they say will do the same thing. They sell lots of them and get no returns. Its worth a try. Will let you know.
chadnliz
3,736 posts
 
All the same it should be fixed regardless because now we know its not correct is all.
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