2. home-theater
  3. 1328750959

Ground loop hum

Just installed my Anthem MRX300 with PVA5 and have a hum . When I remove the Sunfire mark 2 the hum thru the speakers disappears. When I take the Sunfire to my friends Emotiva set up there is no hum thru his Martin loagans. When I replace the sunfire with an Energy there is not hum. Previously with the Marantz Sr19 there was no hum thru the speakers either. All else remains the same. Any guidance?
Brian
brianvportugal
chadnliz
3,736 posts
 
If you have cable or sat tv unhook it and see if hum is gone. If it is (and I bet it will be gone) then have your service company fix the earth ground, it will be free.
marakanetz's avatar
marakanetz
5,473 posts
 
Check the ground fault on your outlets. As far as I know Sunfire uses tricy power chord where ground plug isn't used. If you have a ground fault it's gonna hum for sure.
Even if there's a ground fault, if I use my Sunfire SRA via power conditioner, it's no hum at all.
brianvportugal OP
21 posts
 
Thank you both I'll try the sat tonight.

Marakanetz which power conditioner do you use?
Brian
marakanetz's avatar
marakanetz
5,473 posts
 
I use old Panamax Max1500. I bought it for $150 new almost 10 years ago.
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