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Re: noisy 8020 mics

Subject: Re: noisy 8020 mics
From: "Munir kureshi"
Date: Sat Sep 24, 2011 7:02 am ((PDT))
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 w=
orks fine except MK70 which is fairly new has some popping sound issue. I a=
lso use Schoeps CMIT 5 with CCM 8 and that works very well when they are aw=
ay from moisture.



Sent from my iPad

On Sep 23, 2011, at 3:30 PM, bruce seifried <>=

> 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:
> =E2=80=A2 Original order was for one pair each of MKH8020 stereo set, and=

> MKH8040 stereo set. Order date 5/8/08.
> =E2=80=A2 One of the 8020 omnis went bad on my first remote job. Intermit=
> full output noise spikes ruined recording.
> This pair was replaced by Sennheiser on approximately 7/1/08.
> =E2=80=A2 New pair of 8020's both went bad before my first job with them.=
> initially had low-level crackly noise problems. One of them
> subsequently improved, but both were returned to Sennheiser for a
> refund.
> =E2=80=A2 The 8040 pair were initially fine, and worked in my studio. The=
> 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
> ------------------------------------
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
> Yahoo! Groups Links

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