> My specific Telinga question is whether there is any use in driving
> pip microphones from a separate battery and adding a source follower
> with an output impedance of, say, 50 - 200 Ohms? For users of some
> recorders I think it is, but not for others.
> What makes a difference, when and why?
Hi Klas,
Yes, that should be useful. According to the manuals of the Olympus LS 5/10=
/11 recorders, their input impedance is 2 kohm, which is probably more or l=
ess the same as the output impedance of your PIP microphones. While some co=
nfused gurus may claim that this was a perfect impedance matching, it is ac=
tually not! It would only reduce the output signal level of the microphone =
by 6 dB. A high-to-low impedance converter would maintain the original outp=
ut level, which would therefore relax the EIN requirements for the preamp.=
> >So, I'm not surprised why customers are getting lost with these
> >things, when even well-respected manufacturers contribute to the confusi=
on.
>
> I totally agree. And not only respected manufacturers, but strange
> "debates" on the web, where parameters like mV/Pa are treated like
> "opinions"...
Well, the entire audio business seems to be infected by a strange virus tha=
t decomposes our brains ;-)
In my opinion, the internet (and sometimes also places like this discussion=
group) is a perfect venue for high-handed gurus that are trying to distrib=
ute their mad ideas.
I would not be surprised if some day a guru would come up with the statemen=
t that the world was a disk. A few followers might then reply "Oh yes, I ev=
er had that suspicion. You are brilliant!" Within the next few days, almost=
everyone might then believe that bullshit...
This sounds funny but the bad news is that such things really happen...
The funniest think that I ever read here was that someone tried to convince=
us that a common Nightingale alarm call was the perfect duet performance o=
f a bird and a frog :-)
So, please don't believe everything what you read here ;-)
Regards,
Raimund
"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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