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Noise/ Buzz with KM183 when touched
Author: Oren Kirschenbaum
Date: 03/30/2014
Hello,
I have a problem with my two KM183 (matched) that I purchased new just over a year ago:

When connected to a preamp with P48 on if I touch one of them or both together there is a strong buzz. Tested with RME and Lake people at full gain with MTI and Canare starquad cables. Both microphones have the same problem at the same level.

The chain: KM183 -> RME/ Lake -> Digiface -> Laptop. All pieces of gear had mechanical earth connection through the rack and firewire cable.

Other microphones that I compared with in this very same setup, even very cheap ones didn't have this problem.

The buzz is actually there even if I don't touch the microphones, at a very soft level.

Here is he scary part: the buzz gets louder if I touch only the laptop! so I guess I could serve as a good antenna :-)

I can't even say if the problem is new or if it was like that from the beginning since I never did this test before. Other than that I haven't had problems with RFI or noise in live concerts so I'm quite confused...

I would be very happy to hear your thoughts about this issue.

Thanks in advance for your reply

With kind regards,
Oren Kirschenbaum
Basle  
 
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