The whole series may be affected.
Send them back.
Tell your shop that many people have the problem, even Australie!
Give them a sample recording of noise on a CD.
On 06/10/2011, at 12:16 PM, agriboval wrote:
> Sorry for the trouble to listen to the files, put them on the blog
> as advised. I understand your language poorly, you advise me to
> send them back for repair or is the whole series that seems to be
> affected? Thank you for your answer!
> --- In 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:
>> =E2=80=A2 Original order was for one pair each of MKH8020 stereo set, an=
>> MKH8040 stereo set. Order date 5/8/08.
>> =E2=80=A2 One of the 8020 omnis went bad on my first remote job. Intermi=
>> 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
>> =E2=80=A2 The 8040 pair were initially fine, and worked in my studio. Th=
>> 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
>> 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
>> 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
>> 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
>> 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
>> I feel your pain!
>> bruce seifried
>> eclair engineering
>> On Sep 22, 2011, at 4:21 AM, vickipowys wrote:
>>> 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
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie
> Yahoo! Groups Links
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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