aviel

AKG C4000b hum
« on: January 10, 2019, 05:06:22 AM »
Hey,
I have a problem with my AKG C4000b.
There is a very subtle hum present, but it gets loud when you actually touch the capsule.
My preamp is well grounded, xlr pins 1 in the preamp goes directly to the chasis ground together with the psu and audio ground.

This problem isnt hapening with other mics (dynamic mics though).

What is the best practice regarding mic grounding? Is it correct to assume that the mic chasis is not well grounded?


Re: AKG C4000b hum
« Reply #1 on: January 10, 2019, 05:12:24 AM »
 Check the wiring in actual mic and make sure everything is assembled properly. Grounding issues can happen from misaligned components (like the base ring on a mic not being screwed on properly). Open it up carefully and take some pictures of the internals of the mic so people can tell you if they see something odd with it.


 

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