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Re: [gear] noise floor in pocketable preamps

Subject: Re: [gear] noise floor in pocketable preamps
From: "macmang4125" macmang4125
Date: Sat Sep 16, 2006 6:38 am (PDT)
--- In  Klas Strandberg <> wrot=
e:
>
> I mean,  the noise figures below is what you get with a reasonable
> standard  design of, say, Linear Technology LT1115 or some HQ double
> transistor. These circuits are expensive though, compared to standard
> components and I wonder how many manufacturers that will spend that money=

> on a simple amp for Plug In Power?
>
> Klas.
>
>
> which of these are stereo, providing plug in power in a minijack?
>
> Klas.
>
> At 01:15 2006-09-16, you wrote:
> >"Bruce Wilson"  wrote:
> > > For practical preamps...the noise limit
> > > seems to be about -125 dBu...
> >
> >That matches the manufacturers' ratings of the
> >noise floor in the pocketable preamps I've been
> >looking at:
> >
> >Sound Professionals SP-Preamp ($180)..... -126 dBu
> >Sound Devices MP-1 ($300) ............... -126 dBu
> >Glensound GS-MCA001 ($440) .............. -127 dBu
> >Sound Devices MixPre ($670) ............. -126 dBu
> >Aerco MP2 ($750) ........................ -116 dBu
> >Wendt X3 ($875) ......................... -130 dBu
> >
> >It seems likely that none of these devices will
> >contribute audible noise to a recording made under
> >typical field conditions.
> >
> >Three manufacturers don't specify the dB scale,
> >so these figures may not be directly comparable:
> >
> >Chris Church ST-9000 ($150).............  -125 dB
> >Felmicamps Battery ($200) ............... -120 dB
> >Sonosax SX-M2 ($1100) ................... -129 dB
> >
> >Chances are these preamps will be very quiet, too.
> >
> >--oryoki
> >
> >
> >
> >
> >
> >
> >"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: 
> website: www.telinga.com
>
>From the info on their web site the Felmicamps Battery ($200) supplies pip.
Phil







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