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Utterly baffled by speaker hum..

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frimmers3 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frimmers3 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2021 at 7:19am
Yes, Thanks Ernie...that is exactly what solved the issue...as indicated earlier I had all but given up, trying the Naim on the top, third and second shelf of my Atacama unit to no effect...but moving it just a few inches lower to the bottom shelf removed the "hum" completely.
I have since moved the amp away from the Atacama unit altogether, as far away from the turntable/arm/cartridge as possible....and now more than happy...A "working" Naim plus my new Spatia loudspeaker cable have made listening a joy again!......only problem is...I now have a gap in my Atacama that needs filling(for aesthetic purposes only of course).....
Rega P8, Exact m.m, Accession m. phono stage, Graham Slee /Chord interconnects, Dali Oberon floor standers.
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Ernie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ernie Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2021 at 8:46am
Interesting, and so much for the EMC Directive!
There are 10 kinds of people. Those who understand binary and those who don't.
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BackinBlack View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BackinBlack Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2021 at 9:05am
Unfortunately the EMC Directive doesn't cover many HiFi products, in particular Turntables! 
Just listen, if it sounds good to you, enjoy it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2021 at 10:50am
Originally posted by BackinBlack BackinBlack wrote:

Unfortunately the EMC Directive doesn't cover many HiFi products, in particular Turntables! 

Yes, that's true. Amp and preamp designers must meet EMC and ESD specifications, while turntable, cartridge and arm designers can do what they want. I think interconnects might be exempt too. Makes my job really easy (not).Unhappy
Not simple enough for Google-Bot to understand...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 11:18pm
The joys of so-so shielding by some other manufacturers. That said a large mains transformer or motor coil can be problematic. My P3-24's motor induced hum on the excellent Music Maker III cartridge, the latter was not to blame. I ended up fitting a grounding wire on the Premotec motor casing.

Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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