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Re: noisy 8020 mics - update

Subject: Re: noisy 8020 mics - update
From: "vickipowys" vpowys
Date: Sat Oct 1, 2011 6:20 pm ((PDT))

An update for the Sennheiser 8000 series problems:

After further testing I found that my 8020s also gave periodic noise
when used with Denecke PS-2 phantom power unit running to Olympus
LS10 recorder, as well as to a Sound Devices 702 recorder.  So it is
definitely not the recorder and not the leads.

Syntec in Sydney have also now confirmed that the problem is with the
MICS.  They were able to recreate the faulty fizzing noise by
squeezing the sides of the microphone.  In addition I found that I
was more likely to have problems if the mics were cold.  Syntec
service manager says:

> The noise (crackling) is coming from the capsule earthing
> internally, the tolerance is very small from =93good=94 earthing to
> =93poor=94 earthing.
> It is NOT a faulty component, it=92s an issue =93tolerance=94 adjustment =

> from the factory.
> The faulty units will be returned to Sennheiser Germany for
> investigation.

Replacement mics will be sent out from Germany in a week or so.

As to the problems that some people have had with 8060s and 8070s,
worldwide, I am told that Sennheiser will soon issue a technical
bulletin on this problem.  Syntec did not know if the 8020 problem is
related (although the fizzing sound is the same).

To my mind perhaps Sennheiser have over-miniaturized the 8000 series
of mics, the components are therefore very sensitive to tiny
variations in spacing during construction.  Just my theory though.

However I LOVE the sound of the 8020s and will stick with them rather
than demand my money back, and hope that the replacement mics work to

Vicki Powys

On 26/09/2011, at 6:46 PM, vickipowys wrote:

> Klas,
> 8020s are connected to Sound Devices 702 which supplies the phantom
> power - same system works fine for MKH20s
> I'm currently testing a different phantom power source with the 8020s.
> cheers,
> Vicki
> On 26/09/2011, at 10:31 AM, Klas Strandberg wrote:
>> This is very surprising, Vicky!
>> I really look forward to find out the reason.
>> What do you connect it to? Where does the phantom power come from?
>> Klas

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