Transformer hum

jonatd

Member
Dec 10, 2020
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Hi,

I've just bought a marantz cd6007, and there' a clear mains hum from the unit itself- not in the sound output.
My first thought is magnetostriction in the transformer.
I can hear it up to 2m away in a quiet room.
My old player was silent in this regard, as is my amp, and everything else pretty much.
I'm contacting the supplier, and am thinking it cannot be normal, but I'm interested to hear if anyone else has any experience: I'm hoping a direct replacement will fix it, but if this is normal, I'm going to have to consider a different model instead, I think.

Thanks!
Jon
 

matthewpiano

Well-known member
Nov 23, 2007
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327
19,270
Are you using the power cable that came with it, and is it plugged into the rear of the unit securely?

I had a hum from my CD6007 when I tried it with my aftermarket mains cable, but it disappeared completely when I went back to the cable supplied by Marantz.
 
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nopiano

Well-known member
Feb 15, 2009
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I’m sure it’s not normal. If it had a figure of 8 plug I’d have said try reversing the polarity, but not with a IEC connector. You could just try a spare lead if you have one, and a socket in another room.

Definitely not right if you can hear anything other than with your ear pressed to the casing.
 
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