Good mic choice Tom, and rest assured, you are better off with matched
performance than in trying to achieve the mythical ruler flat frequency
response.
First off, I believe that the smallest increment of frequency gain any
individual can hear is on the order of 3dB--unless you are Bob Ludwig
listening to $250K Eggleston works speakers in a custom multi(?) million
dollar room built just audio mastering, then it's like 1.5dB. Secondly, it
is impossible to build a perfect transducer whether that is a mic or a
loudspeaker. Music studio's and recording engineers have closets full of
microphones so that they have appropriate choices for the appropriate
conditions. We all might love to only have a single mic for every purpose
but there are so many different purposes that it just is no possible.
Thirdly, I am not sure in what context you saw the ruler flat frequency
plots for other DPA mics, but you should know that all literature printed
are "normalized" or "idealized" frequency responses that are representative
of the line and type of mic. Only when you have purchased and received a
mic from a reputable manufacturer do you get an individual frequency
response for the capsule you have purchased. /sarcasm mode on. Anyway, since
you took such a long time to make this choice and since you did choose such
exemplary microphones, you should be ashamed of having buyers remorse :)
/sarcasm mode off.
Just go out and record some things, you'll feel much better.
S
-----Original Message-----
From: Tom Thorley
Sent: Wednesday, December 18, 2002 4:48 PM
To:
Subject: [Nature Recordists] Advice on DPA/B+K stereo pair please!
Hi all,
I have just taken the plunge and made my most significant investement in
nature
recording yet. I have, after quite literally years of deliberation bought a
matched pair of DPA 4006's. I appreciate that two omnis are not the easiest
mics to get good recordings with, but with a little fieldcraft they are
capable
of the most startlingly transparent but present sound.
I am however in need of your advice following up on the matched pair issue
raised with binaural mics recently.
I have seen DPA mics with ruler straight on-axis free field response but
mine
have a 1/2dB variation with quite a few wiggles between 20Hz and 7kHz then a
1
1/3 dB rise starting at 7khz and peaking at 15khz, beyond 15khz there is a
1/2dB disparity between the mics.
My question is, what is more important having a pair of mics that are
acurately
matched or having a ruler straight dB-frequency response (I have been given
the
best matched pair of capsules they had) and are any of the stats quoted
above
an "issue" in a practical sense given that DPA mics often have ruler
straight
responses and subscribe to very high standards.
It has been a massive investement for me and although some of these things
may
seem fussy I still have an opportunity to exchange them, so your advice
would
be warmly welcomed.
Yours,
Tom
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