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Re: noisy 8020 mics

Subject: Re: noisy 8020 mics
From: "vickipowys" vpowys
Date: Sat Sep 24, 2011 8:25 pm ((PDT))
Hi Munir,

This thread started because I was having noise problems with my new
MKH8020s.  In the past week I have found out that there is a noise
issue with the entire 8000 series of mics, all the models, not just
mine (i.e. 8040, 8060, 8070).  While some people have these mics and
they work OK, others find they have periodic loud fizzing noises in
the mics.

So no, definitely NOT, I would NOT recommend the 8000 series mics as
100% dependable.

Others might like to chime in on what mics they have found to be 100%


On 25/09/2011, at 1:27 PM, Munir kureshi wrote:

> Hi Vicki,
> Thank you for your input, it really helps. You like MKH8020, but
> you also mention that they are good when they work. Have you had
> any problems with them? I am recording some extremely endangered
> animals and if you are lucky, you get one chance to record them.
> You have to have 100% dependable equipments. I will checkout 4022
> and see how they sound.
> Regards,
> Munir.
> Sent from my iPad
> On Sep 24, 2011, at 6:08 PM, vickipowys <>
> wrote:
>> Munir,
>> I have compared MKH20 mics with MKH8020 mics and I like the sound
>> from the MKH8020s much better - when they work that is!  MKH20s are
>> better for nature recording with the Free Field switch ON, but are
>> still not as good a sound as the 8020s.
>> Many on this forum use Audio Technica 4022s which sound very good but
>> I've not used them to make a direct comparison.  I've no experience
>> with any other brands.
>> Vicki
>> On 25/09/2011, at 12:16 AM, Munir kureshi wrote:
>>> Sounds like Sennheiser MK80_ _ series microphones have some serous
>>> problems. I am glad people are posting their experience. My plan
>>> was to get a pair of MK80_ _ for stereo recording. Can somebody
>>> suggest other microphones in this category that is comparable to
>>> MK80_ _. I have MK70/MK30 pair and it works fine except MK70 which
>>> is fairly new has some popping sound issue. I also use Schoeps CMIT
>>> 5 with CCM 8 and that works very well when they are away from
>>> moisture.
>>> Regards,
>>> Munir.
>>> Sent from my iPad
>>> On Sep 23, 2011, at 3:30 PM, bruce seifried
>>> <> wrote:
>>>> Oh, man. I know this issue well. Unfortunately.
>>>> Rather than trust my sometimes quirky memory, I will copy/paste
>>>> part
>>>> of one of my emails to my dealer:
>>>> *********
>>>> "Here's a recap of my MKH8020/8040 adventure:
>>>> =95 Original order was for one pair each of MKH8020 stereo set, and
>>>> MKH8040 stereo set. Order date 5/8/08.
>>>> =95 One of the 8020 omnis went bad on my first remote job.
>>>> Intermittent
>>>> full output noise spikes ruined recording.
>>>> This pair was replaced by Sennheiser on approximately 7/1/08.
>>>> =95 New pair of 8020's both went bad before my first job with them.
>>>> Both
>>>> initially had low-level crackly noise problems. One of them
>>>> subsequently improved, but both were returned to Sennheiser for a
>>>> refund.
>>>> =95 The 8040 pair were initially fine, and worked in my studio. They
>>>> were set up here prior to a remote job in October, and one
>>>> developed
>>>> the same low-level crackles that the second 8020 pair had. This
>>>> noise
>>>> took about a minute to get going before manifesting itself, and was
>>>> then continuous. These were returned to Sennheiser for a refund.
>>>> I returned the 8020/8040 pairs for a refund reluctantly, since I
>>>> did
>>>> very much like their sound, especially the 8020s, but I no longer
>>>> trust that these microphones are reliable enough for me to use in a
>>>> professional situation.
>>>> As a circuit designer myself, I will hazard a guess as to what
>>>> might
>>>> be the cause of these problems.
>>>> If it were not for the intermittent full-level noise problem
>>>> with the
>>>> first 8020 pair, I would guess that there was some form of
>>>> contamination to the high impedance section of the pc boards
>>>> happening
>>>> during manufacture, perhaps due to incomplete removal of flux
>>>> during
>>>> soldering. Another possibility is a bad batch of FETs or
>>>> transistors
>>>> sneaking into production. Less likely but still possible would
>>>> be bad
>>>> capacitors. Obviously, I did not open these to determine for
>>>> certain
>>>> what the problem(s) was/were.
>>>> However, I did notice that the small circular pc board located
>>>> between
>>>> the two halves of the microphones was not firmly attached in place,
>>>> and was not always accurately centered. In fact, in one of the
>>>> mics as
>>>> initially received it was so far out of alignment that there were
>>>> positions of rotation of the XLR assembly where the pin was
>>>> barely, if
>>>> at all, making contact with the circular pc board trace. This
>>>> might be
>>>> a design decision that should be rethought, at least to improve on
>>>> the
>>>> dimensional tolerances  involved."
>>>> *********
>>>> My dealer, Steve Remote at Aura Sonic, was a complete saint during
>>>> this nightmare, and managed to get Sennheiser to completely refund
>>>> the
>>>> cost of these microphones. I have refrained from going public about
>>>> all this, since I had not seen any other mention anywhere of anyone
>>>> else having these sorts of problems, and I was beginning to
>>>> doubt my
>>>> own sanity. I tried these mics with different mic cables, two
>>>> different Sound Devices 702 recorders, the KORG DSD recorder,
>>>> and the
>>>> outcome was always the same. Sennheiser denied that anyone else was
>>>> having these problems. Apparently, I'm not insane, as is now
>>>> apparent.
>>>> Yay!
>>>> I feel your pain!
>>>> bruce seifried
>>>> eclair engineering
>>>> On Sep 22, 2011, at 4:21 AM, vickipowys wrote:
>>>>> All,
>>>>> Does anyone else have problems with periodic loud fizzing noise
>>>>> from
>>>>> Sennheiser 8020 mics?
>>>>> Sennheiser replaced one set of mics ('faulty capsule' they
>>>>> said) but
>>>>> the noise persists in the replacement mics despite me checking
>>>>> absolutely everything by way of leads and phantom power voltage
>>>>> and
>>>>> connectors etc. etc.
>>>>> Help please!
>>>>> Vicki Powys
>>>>> Australia

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