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Re: preamps

Subject: Re: preamps
From: "Rich Peet" <>
Date: Thu, 21 Apr 2005 16:47:18 -0000
I have a sony md that uses the same connector for the "line in" as
the "mic in".  I also have a sony md that uses a separate connector
for line in from the mic in.

I will try and test these with a quiet mic with and without an
external pre in the next few days.

Need to catch up on other chores first.

Rich

--- In  Klas Strandberg
<> wrote:
> Haha, no, I'm not going to download it over night!
> It's obvious though, that someone has to take a real grip over this
problem.
>
> I'm happy that I have been rigid on this point, as it might lead to
this
> "real grip".
>
> Klas.
>
>
>
> At 17:20 2005-04-21, you wrote:
>
> >At 12:29 PM +0200 4/21/05, Klas Strandberg wrote:
> > >  >
> > >>A considerable jump in quality would be to mics with much lower
self
> > >>noise and high output, if possible . I'm not familiar with all
of the
> > >>mic options that will run on power in plug (PIP) form your MD
mic
> > >>input jack or from their own battery power. The EM-23 by
Telinga is
> > >>one  PIP choice and the "ME" series of battery-powered
Sennheiser
> > >>mics have low noise and high output.
> > >
> > >I have never connected a EM23 to Plug In Power without getting a
low (13-14
> > >dbA) microphone noise. Never preamp noise!
> >
> >I'm all ready to accept that self-noise for the MD consumer mic
pres
> >is <13dBA, believe me! However, every time I test for this though
> >with actual mics at our disposal, I'm not able to confirm it. The
> >below  link is a 9mb (earlier) test you might be able to download
> >over-night.  After listening to the test, how does one explain the
> >better performance of the 183's if the mic pre isn't introducing
> >noise for the NT4 with its 17dBA self noise?  Shure specs the 183
> >with more self noise at 23 dBA.
> >
> >http://www.uwm.edu/~type/Mic%20Preamps/WR-183_WM-61A_NT-4%5e.mov
> >
> >To save the movie, use right click and save-as from:
> >http://www.uwm.edu/~type/Mic%20Preamps/
> >
> >I'll be doing some more tests running the same mics through a MD
mic
> >pre and then an MP2.  I have an EM-23 that's wired PIP. If Doug
has a
> >EM-23 wired  phantom that he can send me for this test, that would
be
> >great! Do you have a sensitivity rating for the EM-23?   I'll
compare
> >the EM-23 to other PIP/bat powered mics. I'll be happy to snail
mail
> >you all of the tests on a CD.  Rob D.
> >
> >
> > >The only time I have got preamp noise with Walkman-type
recorders was with
> > >the newer versions of Sharp MD's. I wrote about it here. When
using good 10
> > >mm electrets as the Primo EM100, which has a FET-IC, not only a
FET, - the
> > >plug in power voltage provided by those Sharps go down to some
0,4v and the
> > >mic output drops 20 db. Then comes the preamp noise, of course.
> > >This is a Sharp problem, using the same mic's with Sony works
fine.
> >
> >My tests are with a sony NH-900 HiMD recorder. ~1.8 volts unloaded.
> >
> > >
> > >Klas.
> > >
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
>
> Telinga Microphones, Botarbo,
> S-748 96 Tobo, Sweden.
> Phone & fax int + 295 310 01
> email: 
>         





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