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RFI from steel TV bracket?

Yesterday I installed a new TV on a steel wall-mounted extendable bracket between all my electronic components.
I now have a low hum/buzz from both speakers on all sources....even with the preamp on mute?
When I switch the preamp off.....the hum is still there.
The only way to remove the hum is to switch the amps off?
I tried grounding the steel bracket to the preamp and then the amps without success.
The previous TV was in the same location but sitting on the shelf.....not a steel wall bracket.
Any help would be dearly appreciated?
128x128halcro
halcro's avatar
halcro OP
2,664 posts
 
I still think there is a possibility that the interconnects that go from the preamp to the amp my not be shielded enough for the new environment.
That was my initial thought which is why I wrapped them in aluminium foil which reduced the hum somewhat.
I hope we're all right as I've just ordered an XLR pair of Cardas Clear interconnects and George Cardas tells me they are the best shielded cables he knows of?
He guarantees my satisfaction.......which is a great attitude from a manufacturer.
I'll know in about 3-4 weeks when I receive them. Fingers crossed :^)
Thanks for all your help.
Cheers
Henry
halcro's avatar
halcro OP
2,664 posts
 
Received the Cardas Clear XLR interconnects today and installed them between the Halcro DM10 pre and the DM58 monoblocks.
Absolutely no hum or buzz whatsoever.
The shielding in these cables is obviously so superior to the old Hexlink 5 interconnects and/or the balanced XLR method of connection combine to lower the noise floor from the speakers to nil :^)
Now I need time to see if I can 'hear' other benefits?
atmasphere's avatar
atmasphere
11,856 posts
 
Sweet.
hifihvn
943 posts
 
Sounds great.
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