I did something like that for the older zoom h2, modified so the four mic i=
nputs were taken to an five pin xlr. I built a box with four old film mixer=
transformers and five nine volt batteries to connect to this. no amplifica=
tion, but the transformers provide a very large gain, and I ended up adding=
potentiometers before the zoom H2. certainly a very good way of getting so=
me noise free gain.
The h2n is overall a better machine and it should be possible to tuck in tw=
o small transformers where the microphones now sit, and terminate in mini x=
lrs. you will loose four channel mode, but it should make for a tidy low co=
st low noise recorder
umashankar
From: " [naturerecordists]" <=
ps.com>
To:
Sent: Saturday, October 4, 2014 8:04 PM
Subject: [Nature Recordists] Re: H4n noise
[naturerecordists] writes:
> I'm asking an advice about a different recorder because the H4n used wit=
h external mics is very noisy, too much also for a non-professional use as =
mine.
The inputs will be noise matched to the built-in mics, and the odds are tha=
t
any external mics will not have an optimum noise impedance match. The input=
impedance is not specified in the specs as far as I can see, let alone an
optimum noise impedance match.
For the record, an optimum noise impedance match may not be the same as a
"plain" impedance match, but it will give the lowest noise levels relative=
to the wanted sound. As an example, an internal mic will often have an
impedance in the tens of kilohms, and plugging in a high quality 200 ohm mi=
c
will most likely give poor noise figures.
> Or maybe some advice about how to use it in a more satisfactory way...
>
> A preamp?
This is what I use with a "toy" recorder. Using a line in, many digital
recorders give a surprisingly good quality recording. A good preamp may wel=
l
cost more than the recorder. It is also another box to carry. The problem i=
s
that most external mics are low impedance and will not give optimum noise
performance into a medium or high impedance input. A cheap preamp could be=
no better than the original recorder inputs for the same reasons.
An alternative solution - but not a fashionable one - is to use mic
transformers with a suitable noise impedance matching ratio.
David Brinicombe
------------------------------------
Posted by:
------------------------------------
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
------------------------------------
Yahoo Groups Links
https://info.yahoo.com/legal/us/yahoo/utos/terms/
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
------------------------------------------------------------------------
Yahoo Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/naturerecordists/
<*> Your email settings:
Digest Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/naturerecordists/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo Groups is subject to:
https://info.yahoo.com/legal/us/yahoo/utos/terms/
------------------------------------------------------------------------
|